Why are comments useful on blogs?

Comments on Blogs are very useful as they provide the Blogger with useful feedback and constructive criticism which could help them improve their work and produce even better documents. Also, as all the work we want to show is visible, all our work can be quickly marked and commented on from a different computer, allowing us to improve our work anywhere. We can also ask for advice from our peers, who can compare our work to theirs and give advice based on their personal experiences and productions.