What are backlinks and check backlink

Backlink (or incoming link) is a link on a website that leads to your own website. For example, you have a website name websitebuildingguide.blogspot.com. A website named webincoming.blogspot.com has a link on their website in which leads to websitebuildingguide.blogspot.com. Then this link is backlink for websitebuildingguide.blogspot.com.

Backlink serves two purposes:

(1) Search engine optimization: because part of the algorithm for ranking your page on search engines is determined by the number and quality of backlinks to your site. More quality backlinks mean more preference.  

Search Engine Optimization book and video

Search engine has criteria to search. Depending on this criteria, search engines produce the best on at the top and others gradually. 'Search engine optimization' refers to adaptation of a site to criteria of search engines, so that the site gains top position in search results. Why not read Google written 'search engine optimization'. Click right button of mouse on the link and select 'save target as' to save it on computer. then read carefully.