![]() Finding outbound links from a page is easy - most web browsers allow you to look at the source code of the page using the view-source" feature. View-source" normally lists links in a" href" html tags. Finding backlinks to a page is a far more difficult proposition inbound" links" to a page are referred to as backlinks. To find incoming links, it is necessary to crawl the worldwide to find as many links as possible. The data gathered from the crawl is used to maintain an index" a kind of link map. Backlink checkers are powered by indexes. Some backlink checkers offer more than one index, which can be confusing at first. A choice of indexes gives the user a choice to see if they want to look at recent data or for data gathered over a longer time. Because the internet is very, very big, it costs a lot of money to crawl and store the data. The most valuable data a backlink checker can store are external backlinks. Many backlink checkers focus on external backlinks because of this value. Are all backlinks equal? Much like recommendations and references, Links can be thought of as having strength. |