Back-links are incoming links to a website or URL. They are often used interchangeably with inbound links, incoming links, inward links, and in-links. In the world of SEO, back-links, like Page Rank, are an indicator of link popularity or importance of a particular web page. YOU CAN SUBMIT Directories and Forums, logs to get free back links from many countries and many sources. This is free of generating traffic to your sites. You can get the Free Directories list in Google and yahoo search. You can submit those Directories. Also get the best SEO service named as Search Engine Visibility from http://www.Tucktail.com/ this helps to drive more traffic, Back link, increase page rank by submitting your sites in many search engines and do many process.