Blogging software is a simple Content Management System (CMS) that easily adds new pages and integrates them into your site's navigational structure and linkage.
Blogs and blog posts are naturally search-engine friendly because they are text-rich, link-rich, frequently-updated web pages that use style sheets and have very little extraneous HTML.
Optimizing a blog is very similar to optimizing a website, and optimizing a blog post similar to optimizing a web page, but depending on the blogging service or software you use, the results may look somewhat different.
If you follow some simple rules for search engine optimization, your blog can rank much higher than static website pages in the search engine results pages and can then greatly benefit your primary web page SEO efforts.