Claiming your blog establishes that you are its owner, and allows you to use Technorati services to increase your blog’s visibility.  Besides blogging consistently, joining  social sites, doing press releases, article writing, and tweeting, there are services such as Technorati that also help you get exposure.  It is a lot of work to set up a blog and then to blog consistently.  You do not want to go through all that and not reap the rewards of your efforts.  It is all about getting traffic to your blog.  I am doing this to build my business.  So I want people to visit my site.  How else will people know the products I have or the terrific business opportunity that Xano is?