Google PageRank là gì?

http://inet.edu.vn/pagerank
Bạn hay theo dõi thứ hạng Alexa. Tình cờ bạn nghe được 2 webmaster tranh luận:
Webmaster A: Site của em vừa lên top 50k (50.000) Alexa rồi, mừng thiệt bác hehe!
Webmaster B: Thời nào rồi mà còn tin Alexa bác? “Pro” bây giờ toàn nhìn vào PageRank thôi! Alexa 50k mà PageRank3 bèo nhèo thế kia thì không thể so với site PageRank5 của người ta! À mà Google vừa update (cập nhật) PageRank sáng nay đấy, site tớ từ PageRank4 lên 5 nè kekeke…
Bạn tự hỏi không biết PageRank(PR) là gì, được tính ra sao, bao lâu cập nhật một lần? v.v…
Mình sẽ lần lượt trả lời những câu hỏi trên thông qua các bài viết. Nhưng trước hết mình có thể giải thích ngay rằng  PageRank - PR, khác với Public Relations – quan hệ công chúng).
Ngoài ra mình cũng sẽ giải đáp vài thắc mắc của webmaster như:
- Sao site tớ lâu quá rồi mà vẫn PageRank 0?
- Trao đổi link với site có PageRank thấp hơn hoặc bằng 0 có sao không?
- PageRank thấp hoặc bằng 0 là site kém?
- Làm sao để tăng PageRank nhanh chóng?
- Site mình có PageRank cao hơn site kia nhưng lại xếp dưới trong SERPs? Anchor text vs PageRank? Googlebomb ra sao? v.v…

Google PageRank – Thước đo tầm quan trọng tương đối của trang web

Google xem mỗi liên kết (link) là một lá phiếu (vote). Trang web B link đến trang A được Google hiểu là trang B bỏ phiếu cho trang A, hay nói cách khác trang A được 1 phiếu bầu từ trang B.
Mỗi phiếu bầu có giá trị khác nhau. Google không chỉ quan tâm đến số lượng mà còn phân tích chính “trọng lượng” (tức tầm quan trọng) của lá phiếu. Cả trang B và trang C cùng trỏ về (link đến) trang A nhưng nếu bản thân trang B quan trọng hơn trang C thì trọng lượng lá phiếu của trang B dành cho trang A sẽ “nặng” hơn của trang C dành cho trang A.
Trọng lượng lá phiếu vẫn chưa quan trọng bằng mức độ liên quan giữa 2 đối tượng cho và nhận lá phiếu. Độ tương quan (tức điểm chung) giữa 2 trang web được tính dựa trên mức độ khớp giữa chủ đề (theme) và nội dung (content) của chúng.
Google PageRank tính cả mức độ liên quan giữa 2 trang liên kết và tầm quan trọng nội tại của trang bầu chọn để xác định giá trị trang được bầu chọn. Trang A có nội dung về thương mại điện tử sẽ chẳng nhận được giá trị nào từ trang D nếu trang D bàn về bóng đá.
Tầm quan trọng của trang bầu chọn và độ tương quan giữa trang được bầu chọn và trang bầu chọn tạo nên giá trị hay chất lượng liên kết.
* Kết luận: Google PageRank là hệ thống kiểm định giá trị liên kết nhận được, dựa vào số lượng và chất lượng liên kết, để quyết định tầm quan trọng của trang web. Ngoài ra PageRank còn tính dựa trên những yếu tố khác mà Google không công khai (vì e ngại webmaster sẽ “chạy đua PageRank ”một cách không công bằng.)

Ngoài ra, đối với Google, PageRank là một trong những yếu tố then chốt (then chốt, không phải duy nhất và quan trọng nhất) ảnh hưởng đến vị trí xếp hạng trang web trên các trang kết quả tìm kiếm (SERPs). Tuy nhiên trang A có PageRank cao chưa chắc xếp hạng tốt hơn trang B có PageRank thấp hơn nếu trang A có chủ đề và nội dung không khớp với từ khóa người dùng gõ vào ô tìm kiếm Google (sẽ minh họa sau).
PageRank có giá trị 0-10 và có thể nhìn thấy thông qua Google Toolbar.
Ví dụ PageRank của SEO top google vẫn chỉ là số 0 tròn trĩnh (nhưng mình hoàn toàn tin lần cập nhật sau sẽ khác ^_^).
PageRank của từng trang trong website độc lập nhau gọi là Internal PageRank (thay đổi thường xuyên, có thể là một tuần vài lần và không nhận thấy qua toolbar), phân biệt với Google Toolbar PageRank (khoảng 3-4 tháng thay đổi một lần, có thể nhìn thấy ở toolbar).
Để minh họa, mình dùng 1 ví dụ xã hội về giá trị phiếu bầu ảnh hưởng đến thứ hạng trên kết quả tìm kiếm như sau.
Công ty XYZ cần tuyển 1 trị trí chuyên gia SEO (SEO Expert).
Vòng cuối cùng còn lại 3 ứng viên, hiện là 3 chuyên viên SEO (SEO Specialist) đều đạt tiêu chuẩn (gần) như nhau về kỹ năng, trình độ, kinh nghiệm. Khác biệt duy nhất giữa 3 chuyên viên này nằm ở phần Người giới thiệu (Reference):
+ Ứng viên A được Sếp công ty hiện tại – một người uy tín trong làng SEO Việt Nam đề cử.
+ Ứng viên B được một người chú ruột rất có uy tín trong lĩnh vực may mặc giới thiệu.
+ Ứng viên C ghi tên một đồng nghiệp là chuyên viên SEO trong nhóm SEO tự do (Freelance SEO) ở phần Người giới thiệu.
Kết quả cuối cùng: Chuyên viên A sẽ trúng tuyển vị trí SEO Expert của công ty XYZ.
Tại sao không phải là anh B vì anh ta cũng được một người uy tín giới thiệu? Đơn giản, cây đa cây đề trong lĩnh vực may mặc không thể hiểu biết về khả năng SEO của ứng viên. Nói cách khác, lĩnh vực hoạt động của Người giới thiệu và anh B không giống nhau.
Tại sao không là anh C khi anh ta được người cùng ngành giới thiệu? Vì tiếng nói của người giới thiệu anh C không bằng cây đại thụ SEO Việt Nam.
Trong ví dụ trên, kết quả tuyển chọn ví như kết quả tìm kiếm, ứng viên A, B, C lần lượt là website A, B, C. Người giới thiệu 1, 2, 3 chính là 3 lá phiếu (liên kết) dành cho 3 website. Và kết quả tuyển chọn đã được giải thích thông qua Google PageRank.
(còn tiếp…)
Bổ sung: ngay thời điểm mình viết bài này, Google Toolbar PageRank vừa cập nhật giải thuật, “bãi bỏ” một số hình phạt đã áp dụng trước đây…

35 tips to increase backlinks

Increase backlinks 35 tips:

List policy

1. Establishing a "35 × × ×". This article will often become authoritative documents a large number of references, the referrer link to this article.
2. Write a "help you × × × 10 big trick. Very easy to get backlinks .
3. Collate a list of references for a topic.
4. Summary Ten mysteries of a particular industry.
5. A list of industry experts. If you can make these experts impressed doing the project looks very authoritative, these experts might be thanked and links pointing to you.

Authoritative

1. The content is written in a simple, easy to understand, so that more people can understand and spread for you. The SEO 100 why the contents of the popularity is due to this.
2. Minimize grammatical or spelling errors, this is very important if you want to get links to authoritative sites.
3. Site to add the "privacy policy" and "About Us" page, so it looks more trustworthy. Blog, put a photograph of yourself can create authoritative.

News and aggregation

1. The high-quality articles published in to iResearch, Donews IT industry news site. These sites rank well, in addition to the increase in the reverse link will bring you quality traffic.
2. Submit articles to industry sites and forums. Such as the SEO research articles, submitted to the SEO information the website or SEOWHY Forum.
3. Send a press release. The high-quality press release submitted to the news portal.
4. Tracking sites publish your article. To provide them with the manuscript sources.
5. Post exchange articles with other sites.
6. Send the articles to the RSS sites such as catch shrimp, fresh fruit.
7. Make a people feel very important investigations, such as housewives. If you make others feel important, others will be free publicity for you.

Directories, social bookmarking

1. I am old, but very useful. Submit your site to DMOZ-Open Directory or other free directory.
2. Your article, Baidu the collections, Yahoo possession, Google Bookmarks, QQ bookmark social bookmarking.
3. Allows users to subscribe to your posts through Google Reader, RSS.

Partners, professional exchange

1. Ask your partner or business partner can give you a link.
2. Recommended links with each other and partners.
3. Links.
4. Exchange links. But pay attention to the link farms farther.
5. With professional exchange links with other sites. Such as open source, would have a link. (Such as some of the open source program have a link to point www.seowhy.com ),
6. Free exquisite open source web systems for content management system CMS or Blog template. Do not forget to add template design by × × ×.
7. Plug-ins for the open source web application development, and the left of the link.
8. Develop useful tools, published and left the download address.

Free Link

1. Participate in the Q & A platform such as Baidu know, a Yahoo knowledge, ask, and so on. You can add a link for the site.
2. Participation in relevant forums, such as Google Groups. You can add a link for the site.
3. Participation in social wiki platforms such as Baidu Encyclopedia, Wikipedia editors.
4. Google page to create a professional web and establish point.

Comment

1. Blog comments, and leave their name and link.
2. If you purchase a product online, and put the product reviews written down, will bring the link. You can write a product recommended Note: To write credible, if there are specific circumstances.
3. Professional posts, comments, and left a signature point.

Meetings and social relations

1. Industry conferences, photo shooting industry celebrities (drunk), and leave your wonderful commentary. This may be a good link bait.
2. Interestingly useful interview easily become original, and spread rapidly.

28 SEO Tips to improve keyword ranking

Keyword position, density and treatment

1. Appears in the URL Keywords (English)
2. Keywords appear in the page title (1-3)
3. Keywords tab Keyword (1-3)
4. The description tag keywords (the main keywords repeated 2 times)
5. Naturally occurring keywords in the content
6. The contents of the first and last paragraphs Keywords
7. H1, H2 tags Keywords
8. Contain the keywords in the the export link anchor text
9. Image file name contains the keywords
10. Key words appear in the ALT attribute
11. Keyword density of 6-8%
12. Keywords bold or italic

Quality of content, frequency of updates, relevance

1. Original content, should not be repeatedly reproduced
2. Contents of independence, and other pages at least 30% of the differences
3. 1000-2000 words, reasonable segmentation
4. Regularly updated, preferably daily
5. Content around the page key words to start with the theme of the entire station
6. Comments feature comments Keywords

Incoming links and anchor text

1. High PR value of the site's incoming links
2. The contents of the import of the relevant page link
3. Page keywords contained in the the Import link anchor text
4. Anchor text exists in the content of the page
5. Anchor text around related keywords
6. The import link exists more than 3 months
7. The import export link of the page where the link is less than 100
8. Incoming links from different IP address
9. Natural increase in incoming links
10. Diversify anchor text (such as, SEO and SEO 100 000 Why)

Can make your keyword ranking master SEO techniques above, there is a significant improvement.

What Are Low-Quality Pages and How Do You Fix Them?

In some of my recent reviews of websitesthat have recently lost Google traffic, I've found a common thread: lots of low-quality content pages. But the interesting thing is that this wasn't the sort of low-quality contentcreated by some scammy SEO in an attempt to boost search engine rankings. This was low-quality content that was naturally created with no thought of the search engines.

What could be the matter with that?

Before the days of Google's Panda filters, most likely, nothing. But when Google let their Panda out of the zoo, some pages on some websites that were previously ignored, started to cause rankings and traffic problems for the overall website.

What might low-quality content pages contain?

For the most part, the type of low-quality content pages I'm talking about here simply don't contain much information at all. They may only have a few words or sentences outside of the global template of the page. Or they may contain information, but it's very similar to what's on other pages of the website. Most of the time these low-quality pages been dynamically generated by whatever content management system (CMS) the site is using. This is especially true of blog sites using WordPress or other blog software, as well as forum sites.

Let's look at some specific types of low-quality content:

Profile pages:

Empty - Many forums, blogs or other community sites encourage people to become members. In order to do so, they have to provide information that is used to create a profile page of that person. There's nothing inherently wrong with these, but some of them may be created with nothing more than a user name and a bunch of empty fields. So you can end up with hundreds, if not thousands, of nearly empty pages.

Spammy - Profiles have also been a target for spammers because some of them allow you to add links. Even those that don't specifically allow links can sometimes be hacked to include a link by a smarter-than-average web spammer.

Recommended Fix: There are a few ways to deal with this. You could make profile pages invisible to anyone (including search engines) who isn't registered and logged in. Or you could add the noindex Meta tag to all profile pages. If you prefer to have your profile pages indexed, you might try to require more information than just a name so that there's less chance of the profile seeming empty. And if you allow links, be sure they are automatically tagged with the nofollow attribute. You may also keep all profiles invisible until they go through a manual human review.

Empty Directory or Search Results Pages: Websites that have a directory of sorts will often have a number of different categories. This is a great idea when there are enough items, people, or places that deserve to have their own category. But sometimes a website will get too granular in its categories and only have one (or sometimes zero) results contained within them.

It's easy to see how this creates a poor user experience, and thus a low-quality content page.

Tag Pages: While adding tags to classify blog posts can make for a helpful way to browse a blog, creating an unlimited number of tags and tagging every post with a bunch of them creates tons of low-quality content tag pages. If a tag is so specific that only one post is tagged with it, the tag page itself will list only that one post. And if that post is tagged with other unique tags, a whole bunch of very similar stand-alone tag pages will be created that all just link to this one post. Which means they've defeated the purpose of tagging as a means of categorizing posts.

Recommended Fix: Don't use tags to stuff keywords on your pages (à la The Huffington Post). Instead, use them for their intended purpose by creating a limited number of them that correspond to their own unique category. This will provide an alternate way of browsing your blog, as well as more opportunities for Google to find and spider your pages.

If it's too late to start over with your tags and you've already got a crazy array of meaningless tags, then add the rel=nofollow to the tag links themselves, and add the "noindex, follow" Meta tag to the resulting tag pages themselves. This way you won't have all those duplicate pages indexed, but the search engines can still follow the links contained within them.

Posts that simply link to something else: You see something interesting on another site that you want to tell your readers about, so you dash off a quick blog post that says, "Here's an interesting article about whatever" and provide a link. Even worse is if you link to these "empty posts" from elsewhere on your site in the guise of providing actual information if they click the link. This only annoys your readers because they have to click yet again to get to what they really want to see.

Recommended Fix: A better place for quick recommendations would be to post it on your social media channels and/or link directly to the real content from elsewhere in your site where it makes sense to do so.

As you can see, whether or not you intended to have low-quality content pages on your website, you may have some anyway. Whether we agree with the way Google is handling this sort of content or not, the fact is, many sites have been negatively affected by it. Therefore you'd be smart to recheck your own site every so often for low-quality content and go through each of the recommended fixes to remove it ASAP!

5 Rookie SEO Mistakes That Can Kill Your Search Engine Traffic and Some Tools to Help

Mistakes. We all make them, and ideally we learn from them. But even the smallest of mistakes on your website can sometimes cause big problems. And big problems with a website can cause lost traffic, money and jobs.

With that in mind, here are 5 mistakes I've seen 
often enough to warrant a mention. I hope that you can learn from others who weren't so lucky:

1. Telling the search engines you don't want them to add your website to their database or follow its links.

If the pages of your website are not in Google's database, then there's no way you'll ever receive any search engine traffic -- targeted or otherwise. Not a week goes by when I don't see a website where somehow the "noindex, nofollow" meta tags have been inadvertently added to every page (or even just some pages) of the site. Most of the time, it's due to a WordPress setting that goes unnoticed when the website is first being designed. If you literally can't find any page of your site in Google, even for a search on the name of the site or the URL, view the source code to see if you have told Google that you don't want them to index your site.

I use a Chrome extension called "Nofollow," which highlights all links that have the nofollow attribute, and also pops up a little window if the page is set at "noindex." This simple extension is why I end up spotting this so often.


2. Relying on SEO software to "optimize" your website.

Repeat after me: There is no specific number of times a keyword phrase should be used in my content. There is no magic number of words that my pages should have written on them. And there is no best number of words or phrases that belong in a Title tag. And most of all: There is no SEO software that can optimize my website (despite the claims of their creators).

Use your common sense to optimize your site! Learn how your target audience searches for products, services and information such as yours, and write about it accordingly on your website. Then write to make an emotional connection with your visitors so that they'll convert into happy customers.


3. Improper redirecting of old pages (or sites) to new ones via a 302-redirect instead of a 301-redirect.

Whether you've changed your domain name to something different or you've redeveloped your website and all or most of your new URLs are different from the old ones, it's critical to redirect the old to the new via 301-redirects and not 302s. A 301-redirect causes Google to remove the old URL and also to pass the link popularity of the old URL to the new one. But a 302, while redirecting visitors to the correct new URL, will often still be indexed by Google. This causes duplicate content issues and PageRank splitting problems. That is, any links to the old URL will not pass "link juice" to the new one as long as it's redirected erroneously via a 302.

Check the http header status of your redirected URLs to see if they show a 301 or a 302 via the SEO Consultant's server header checker tool.


4. Writing to your CEO instead of your customer.

When you're entrenched in the day-to-day activities of your business, you might forget that the words you use to describe what you do aren't necessarily the ones that will be used by those unfamiliar with what you do. The people who come to your site shouldn't need a translator to understand exactly what you do. And you know who the worst offenders are? Marketers! I fundamentally understand marketing at a commonsense level, because it's a fairly simple concept. Yet when I check out some marketing companies' websites, they might as well be speaking Martian. In addition to the gobbledygook that many companies write, they also don't always speak to their potential customer at all. Instead, they try to impress those customers with how great they are.

To fix these copywriting mistakes, find out the words people use to find products and services such as yours through keyword research, and then tell your potential customers what's in it for them, rather than how totally awesome YOU are.


5. Creating a new site on a new domain and leaving the old site up as well.

I know that it's scary to develop a brand-new site -- especially if (for whatever reason) you must change domain names. But having 2 websites up at the same time is a recipe for disaster when it comes to the search engines. Every time I've seen this done (either on purpose or by mistake), the new website rarely gains any traction in the search engines as long as the old site is still alive and kicking. If you've spent time and money creating a kick-ass new website, don't kill its chances of people finding it through search engines by keeping your old cruddy (but highly ranking) site lurking in the background.

Be sure you follow best SEO redesign practices, 301-redirect all your old URLs to the new, and -- if you are changing domain names -- perform a "change of address" using your Google Webmaster Tools account. After you do these things, your new site should do at least as well as your old site did in the search engines. More likely than not, it will do even better!

There are probably 100 more SEO rookie mistakes that are made every day, but I hope that these 5 -- as well as the tools to help find and fix them -- provide you with a good start toward keeping your website mistake free!

Tên miền không có www

DNS should be set to a domain name without the www

Thus, when the user use domain name without the www, can normally access your website.

SEO correctly handle the relations with www and without the www domain:

1. We talked about the concept of the URL standardized , with www and non-www URL in the search engine seems two URL is different, when they point to the same site, will make the search engines do not understand should choose a URL as the main 's. Therefore, we recommend that qualified host a 301 redirect to the URL standardized set .
2. If your host does not support a 301 redirect links in the form of the absolute address , the home of all links can also be a good solution to this problem.
3. With www and without the www domain name search engine is equal, choose one as the main domain name, internal links and links to the main domain name, so that does not make the PR value of the dispersion.

Rookie Guide:

Domain name without the www how to set up? Assuming your domain name is domain.com

DNS domain management background, set up two A records:

www.domain.com point website IP

The spaces. domain.com pointing to the website IP

After the effective date, both through www.domain.com and domain.com normal access to the Home.

Một liên kết bị hỏng hoặc DeadLink là gì? Và ảnh hưởng như thế nào đến website?

What is a broken link, and what causes it?

A broken link is a link that doesn't work, often resulting in an error page. A broken link happens when the link points to a web page that has been deleted or moved.

Why is it important to fix a broken link? 

Links that are broken will effectively stop search engines from completely indexing your website.  Fixing or removing broken links from your website allows search engines to completely index and tells search engines that your website is not being neglected. As part of the optimization process we will test your Website's links and repair or remove any broken ones.