13 Apr 07: Thirty seven SEO professionals from around the world participated in a poll to vote on what they consider to be the most important factors the Google algorithm considers when ranking a site. The poll set up by SEOmoz asked these professionals to grade various factors according to the perceived importance. This article discusses the Top 10 positive factors.

1. Keyword Use In Title Tags

The title tag is probably the single most important HTML tag, not only because Google considers it to be a very important ranking factor, but also because Google uses the title tag text to create the listing's heading (the blue link) on the search results. It is therefore equivalent to the headline of an ad inciting searchers to visit the site.

2. Global Link Popularity of Site

Last year this would have been considered the single most important factor. However, recent changes in the Google algorithm have slightly reduced the importance of the overall number of inbound links pointing to the site. The factor is still extremely important and weight, authority and relevance of the links are also factored into considerations.

3. Anchor Text of Inbound Link

The text contained within the link (between the <a> and </a> tags in the HTML) is called the anchor text. This text serves as a description of the link's target, and is hence a very clear indication to users and the search engine of what the target page will be about. As a result, this continues to be a very important factor in ranking a site.

4. Link Popularity within Site's Internal Link Structure

Unlike external links from third-party websites, internal links are fully within the control of the webmaster. How these internal links are structured gives Google a very clear indication of which pages are more important for the site owners. Accordingly, Google perceives this as an internal vote for the importance of individual pages.

5. Age of Site

Authority of a site, according to the Google algorithm is determined by two main factors: The number and quality of links pointing to it and the age of the site, in terms of the period of time that the site has contained indexable content seen by the search engines. Webmasters have no control over this factor. The only way to affect this is by buying old websites.

6. Topical Relevance of Inbound Links To Site

Relevance has always been the mantra of Google ranking, and this factor is a mere extension of that fact. Not only is it important to have lots of links pointing to a site, but it is also important that a good number of these links are from sites related to the topic of the target page and the target keyword.

7. Link Popularity of Site In Topical Community

Increased use of social networking sites and user generated content has turned the Internet and SEO around in the past year. Accordingly, a new factor now considered of importance is the link weight and authority of the target website amongst its topical peers in the online world.

8. Keyword Use in Body Text

Link bombs and spam linking enabled websites to be ranked, in the past, for keywords that were not even present on the site. This has changed. Google will almost never rank a site now based solely on links pointing to it, no matter how many they may be. Use of the targeted search term in the visible, HTML text of the page is a must.

9. Global Link Popularity of Linking Site

This is all about PageRank of the site that is providing a link. Number and quality of links matter. The quality of the link is determined by its relevance and by its own link popularity. Hence, a single link from an extremely popular (high PR) website will be worth much much more than many more links from a relatively unknown site.

10. Rate of New Inbound Links to Site

Sudden spikes in the number of inbound links pointing to a site are unnatural. Google constantly monitors the frequency and timing of external sites linking to given domain, even though this may not be reflected in the link counts they show on their search results. A steady upward growth rate is always best.

The full article with all other ranking factors can be read at:

http://www.seomoz.org/article/search-ranking-factors

게임 방법
두 명이 함께 하는 게임이다.
일단 게임을 시작하면 화면 중앙에 그림이 나타난다. 각자 그 그림을 보고 떠오르는 단어를 입력한다. 두 사람이 입력한 단어 중에 일치하는 단어가 있으면 새로운 그림으로 바뀐다. off-limits는 사용할 수 없는 단어이다. 제한 시간은 90초!

Thanks for your contribution. It will help us improve the relevance of image search results so that you and other Google users can quickly and easily find the results you're looking for. To find out more about the images that you labeled and the sites they came from, click on any of the images below.

당신이 게임을 해 준 덕분에 그림을 검색 할 때 정확도를 높혀 줄 수 있다라는 그런 말이다.

컴퓨터 스스로가 그림을 보고 이게 무슨 그림인지 알아낼 수 있는 방법은 아직 없다. 단지  살색이 많으면 음란물이구나하는 그 정도 뿐이다. 어찌 되었건 원하는 그림을 검색할려면 그림에 대한 설명이 있어야 하는데 이 설명을 구글 직원이 할려면 시간이 좀 걸릴 듯 싶다. 그래서 만든 게임이 이미지 레이블러이다. 두 명의 사용자가 직접 그림에 대한 설명을 입력하게 하고 일치하면 그림을 설명하는 단어로 등록이 된다. 그 단어가 계속 반복되면 off-limits이 되고 다른 단어를 입력하도록 유도한다.

이미지 레이블러가 도움이 될까?
구글 이미지에서 man horse 두 단어로 검색해 보았다.