Comments have a lot of value and you should actively encourage people to leave comments on your site. You can encourage people to leave a comment at the end of each post. You simply ask them to share their opinion of your post by leaving a comment.

As you know Google loves content and comments contribute to the content on your site. It also shows that people have visited your site, are interested in what you are saying and are also interacting with you by leaving a comment. All this goes toward your ranking in Google.

We all want to be on page one of Google and that is why comments along with your keywords and optimizing your site are all part of what puts you there.