SEO (Search engine optimization) is a process applied to website to increase positions in different search engines (Google, Yahoo, MSN, AltaVista, Live Search, Ask, Netscape Search, Hotbot, Lycos, Dog pile, Froogle, Webcrawler, Infoseek, Info.com, Gigablast etc) for selected key phrases. Backlink checker is one of the SEO tool for improving the chances they will be found by users.

Backlinks are incoming links to a website or web page. Backlink is link received by a web node (web page, directory, website or top level domain) from another web node. Backlinks are also called as incoming links, inbound links and inward links. Number of backlinks is an indication of the popularity or importance of that website or webpage.

To achieve good position in search engine, quality backlinks is essential to improve Rank and improve the placement of your website within search engine listings. Search engines often use the number of backlinks that a website has as one of the factors for determining that website's search engine ranking. Backlink could be considered as a Quality Backlink if it links to your website with keyword (key phrase) that you are trying to optimize for.

• Backlink Checker Utility - Backlink checker tool is a program that checks the status of backlinks of user website on publisher website and tests the validity of links on the website pages. Link checker software monitors easily link status of your website to check if advertiser website link still points to publisher’s site and sends an alert notification to the website owner if link is not found or is unavailable.