Each link should have some text and content, which is the evaluation of links is very important. This content is the text of the link that appears and that is clicked in the browser to go to the new page. In the event that the link text contains appropriate keyword, which then appears on the page where the link is going, search engine considers this link to be relevant and gives it more weight when calculating the relevance of the back links pointing to your site.

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The content of the reference | Content is King

It is obvious that the simple number of backlinks not give any evaluation criterion. It is necessary to take into account the importance of the connection as well as the number of inbound links.

Search engines use the term citation index for assessing the number and quality of back links to the site. Citation index is a numerical estimate of the popularity sources expressed as an absolute value representing page importance. Each search engine uses its own algorithm for estimating the index page citation. These values ​​search disclosed.

Citation index specifies the relative popularity of sites given the popularity of other sites on the Internet.