Branding is always important to receive more traffic to your website. This is a very nice example to brand your comments, when you leave it for other blogs. When you leave comments on other blogs on WordPress.com and you would like your name to automatically link to your blog, please follow these steps:
1) Login to the dashboard.
2) Go to My Account >> Edit Profile.
3) There is a Field “Website” under label “Contact Info”.
4) Enter the URL of your blog in this field or any other URL that you wish to be linked to your name.
5) Click on Update Profile.
After completing this, any comments you post on any blog in wordpress, your username at the end of the comment will be linked to your blog.