I know many of my readers are unfamiliar with link building, so let me ‘splain a few quick things to help clarify the what, why, and how.
Basically, one good way to expand your reach and readership is to get your blog out there! Blog and RSS directories are simply a credible listing of sites that they choose to display so that there visitors can conveniently find great content, organized by their category of interest.
This is beneficial in two ways. First and primary reason being exposure and potential traffic generation from someone interested in your blog topic, and the second being the quality links that are being built from respected and well ranking sites-which are linking back to yours.