Page Rank Factors

admin    Google     Factors, Page, Rank

Page Rank Factors:

PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page’s value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves “important” weigh more heavily and help to make other pages “important.”

Google uses a PageRank “proxy” value, which logarithmically translates the actual PageRank of a document to a value between 1 and 10, to rank Websites, listed in its (which offers a PageRank order or an Alphabetical order for listings).

PageRank is, in essence, a rough system for estimating the value of a given link based on the links that point to the host page. Since Page Rank’s inception in the late ’90s, more subtle and sophisticated link analysis systems have taken the place of PageRank. Thus, in the modern era of SEO, the PageRank measurement in Google’s toolbar, directory, or through sites that query the service is of limited value. Pages with PR8 can be found ranked 20-30 positions below pages with a PR3 or PR4. In addition, the toolbar numbers are updated only every 3-6 months by Google, making the values even less useful. Rather than focusing on PageRank, it’s important to think holistically about a link’s worth.

Here’s a small list of the most important factors search engines look at when attempting to value a link:

The Anchor Text of Link - Anchor text describes the visible characters and words that hyperlink to another document or location on the web. For example, in the phrase “CNN is a good source of news, but I actually prefer the BBC’s take on events,” two unique pieces of anchor text exist – “CNN” is the anchor text pointing to http://www.cnn.com, while “the BBC’s take on events” points to http://news.bbc.co.uk. Search engines use this text to help them determine the subject matter of the linked-to document. In the example above, the links would tell the search engine that when users search for “CNN”, thinks that http://www.cnn.com is a relevant site for the term “CNN” and that http://news.bbc.co.uk is relevant to “the BBC’s take on events”. If hundreds or thousands of sites think that a particular page is relevant for a given set of terms, that page can manage to rank well even if the terms NEVER appear in the text itself Global Popularity of the Site – More popular sites, as denoted by the number and power of the links pointing to them, provide more powerful links. Thus, while a link from top site may be a valuable vote for a site, a link from bbc.co.uk or cnn.com carries far more weight. This is one area where PageRank (assuming it was accurate) could be a good measure, as it’s designed to calculate global popularity. Popularity of Site in Relevant Communities – In the example above, the weight or power of a site’s vote is based on its raw popularity across the web. As search engines became more sophisticated and granular in their approach to link data, they acknowledged the existence of “topical communities”; sites on the same subject that often interlink with one another, referencing documents and providing unique data on a particular topic. Sites in these communities provide more value when they link to a site/page on a relevant subject rather than a site that is largely irrelevant to their topic. Text Directly Surrounding the Link – Search engines have been noted to weight the text directly surrounding a link with greater important and relevant than the other text on the page. Thus, a link from inside an on-topic paragraph may carry greater weight than a link in the sidebar or footer. Subject Matter of the Linking Page – The topical relationship between the subject of a given page and the sites/pages linked to on it may also factor into the value a search engine assigns to that link. Thus, it will be more valuable to have links from pages that are related to the site/page’s subject matter than those that have little to do with the topic.

These are only a few of the many factors search engines measure and weigh when evaluating links.

If you enjoyed this article please consider sharing it!