Search engines use algorithms calculate the order in which the search results are displayed. Although no one outside the search engine companies know the actual algorithms, search engine optimization (SEO) experts agree that back links are heavily weighed. A “back link” is text on another website that links to your site. Search engines count these links as “votes” for your site. The more votes, the better.Drumming Up VotesThe most common way to get back links it to simply ask another site to.