One of the most powerful promotional tools available to bloggers is RSS. It's a specification that allows your visitors to subscribe to your content using feed-reading software and then receive your latest posts and comments without having to visit your blog. Your new content automatically appears in their feed reader.
RSS and blogging have always been intimately related. RSS has been available for many years, but no one really found a mass application for it until blogging arrived on the scene. The two are a perfect match. RSS is just what bloggers need to keep their readers updated with the latest content from their blogs. Pretty much all blogging software (including WordPress) has native support for RSS syndication.
Some may argue that the uptake of RSS by the Web surfing masses has been a relatively slow...