Blogs offer a number of useful functions such as trackbacks, comments, and RSS. Thus blog optimization becomes a useful part of search marketing. Blog software can help in improving the rankings of a site as it can manage particular type of content like post FAQ, give product updates and provide an online media room.
 
There are category features in blog software which can lead to assemblage of content according to themes. Thus making it simpler to algorithmically categorize content. Your site can get good ranks for those topics if the search engines can easily understand your content. Search engine spiders can easily find and crawl blog content as most blog softwares give simple URL structure. In short blogs can bring more traffic and can be a helpful site optimization tool.