A comment link is the process of posting a comment that contains a link, usually in response to a blogger’s. Commenting on blogs can yield numerous positive results including building a reputation, creating inbound links and possibly building dynamic relationships
Unless you are participating in a blog comment discussion or can provide urgent assistance, it is poor practice to input your link directly within your comment content. Also, be sure not to try to be sly and use anchor text. If you choose to use anchor text, do not abuse this opportunity. It may cause your comments to be indefinitely flagged and regarded as spam.
The best practice is to utilize the URL field that the majority of blogs provide when you choose to provide a comment. This is your free “plug” and should be taken advantage of as frequently as possible.