whatgirls ... about claiming yourblog,
http://www.bloglovin.com/en/support#q=35here's what it says.
"Why should I claim my blog?
Claiming your blog on Bloglovin' acts as a proof that you own the blog - and therefore we can give you extra information about it on Bloglovin' as well as grant you access to change its information, for example description, category and thumbnail.
If you ever want to move your blog to a new address or platform, or you loose access to your blog, or anything else happens to it, we have a greater chance of helping you if you have already previously claimed your blog, since we know that you are the true owner, and not somebody else.
To claim your blog you have to publish a small piece of code on your blog. This code is unique for you and your blog, and by publishing it on your blog we know that you have access to it.
If we didn't do this, anybody would be able to change any information about any blog, which wouldn't be very good."