Building good relevant backlinks is one of the most important factors in Search Engine Optimization.
It is not enough just to have a lot of links pointing to your website, it is the Quality of backlinks along with the Quantity that will really help you to boost your ranking in the Search Engines.
A backlink could be considered as a Quality Backlink if –
1. The Theme of the site that is linking to you is the same as your website.
2. The Anchor Texts of the links are keyword /key phrases that you are trying to rank well for.
(* Certainly there are many other complex areas which can be assessed to check the quality of a link *)
This backlink builder tool basically searches for websites of the theme you specify that contain keyphrases like “Add link”, “Add site”, “Add URL”, “Add URL”, “Submit URL”, “Add Article” etc.