Friendship Link Quantity vs link quality analysis

The initial link calculation is based on the number of links, that is, the number of external links in a Web page, the higher the score on the search engine. The principle is as follows:

Suppose a,b two pages. A has 2 external links, and B has 10 external links. Since B has far more external links than a, indicating that more sites point to B, the search engine will think that page B is more "important" or "authoritative" than page A, that B has a greater right to vote (voting power). Interestingly, because a Web page has the characteristics of all the export links that it has assigned to it evenly, for a and B, the search engine finds that B's export link is more important than a a for a and a for the same number of exported links. In other words, the PR value is high and the number of links to export a few sites to become the ideal link target.

Later, link quality analysis was introduced into the link analysis system, and the link quality and relevance of the first mentioned. Because the search engine thinks: A poor site is almost impossible to get high-quality external links. For the quality of the links, different search engines have different methods of measurement, but the main point is the same-– only those with your target keywords associated with the quality of the site's external links is the ideal link target. Even access to hundreds of low-quality or irrelevant sites is not a link to a high-quality, highly relevant, or complementary site.