Blogs are a huge source to improve your SEO rankings. Blogs work even for new site if used effectively. Blogs are actually used to express thoughts, talk back to customers or as a vehicle to promote product or services. They prove to be an effective tool towards search engine marketing.
Blogs are so much liked by the search engines because the fresh content they carry. A neglected side of a blog is that once a blog pattern is established and Googlebot comes to your site every few days, it can be used to link to other sites, sub-domains or any deep links that you need to get crawled. One more ignored point is that blog can be optimized.
A few things to be considered for blogging are
1. The title of blog should be thought of as a headline
2. It should be so written that it grabs the reader's attention
3. The blog title should get archived
While the main aim of using a blog is to express your views it can even be used in a manner to avil search engine optimization for your site.