Search engines analyze link in their ranking algorithm. In a link analysis process, only the most relevant and popular sites attain a high search engine position. Link analysis is a useful and foolproof method to identify pages that are good for particular key phrases. In fact, link analysis by search engines is a mathematical way to determine if others think that your site is important.
How Link popularity differs from link analysis?
In a link analysis system it becomes easy to identify and filter out spammers who set up several free sites and link them to their main web site. Nowadays, search engines do not give significance to free site links in their link popularity scores, but combine link popularity with link analysis and use it to assign a weighted link popularity score.
All links on the Internet are not equally important. In a pure link analysis system, it is important that links are obtained from popular web sites which are related to the keywords you want to be found for. Getting a few links from popular sites is more useful than getting several links from unpopular web sites.
The other factors that come into consideration in a link analysis system are the context of links, authority of the web sites, the number of outbound links, and the similarity in themes between the linking sites.If you want to achieve high search engine ranks in the search engines that use link analysis process, you have to be associated with reputed web sites. You also have to make sure those sites have keywords related to yours.