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External link building in SEO is a very important link. When everyone in the station optimization to do the same time, the competition is the quality of the chain is high and the number of many. The quality of outside chain is more important than the quantity of outside chain. A high quality chain often trumps dozens of, hundreds of or even thousands of low-quality chains. So what kind of outside chain is high quality outside the chain? The following SEO research and practitioners Shelain to everyone to analyze the quality of the chain of two major factors:
One, from the high weight of the page outside the chain
• External chain from top-level domain page
• Pages from high PR values
• From the foreign chain of the page with gov, edu as suffix domain name
• From the well-known categories of the chain, such as DMOZ, Yahoo directory, etc.
• The outer chain is located on the top and left areas of the page
• One-way link outside the chain
• External chain exists for more than 3 months
• External chain from export links less than 100 pages
Second, from the high related to the outside of the page chain
• Outside the chain page title appears outside the chain anchor text
• External chain anchor text appears in meta of the chain page
• The outer chain appears with the same text as the anchor text
• Text similar to anchor text around the chain (semantic analysis based on search engine)
• The site theme of the chain is similar to the optimized site theme
High-weight and high correlation is the evaluation of high-quality outside the chain of two standards, the external chain page weight higher, the higher the correlation, the quality of the chain is higher. Can be represented by a formula:
High quality outside chain = outside chain from high weight page + chain from high related page
From: http://www.52sexlife.com
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