Why students should blog ?

Why students should blog?
Because there are a lot of reason, the first reason that I thought is: There homework, if they post their homework on the blog, then another people will come to their blog, and when them see the homework, they can give them feedback, not just teacher give the homework feedback, maybe can another people, the strange person or the people that comes from another country, and I think another reason is: share with other people, I make a example: if your homework is about the Country, and then you post on the blog, when someone come to your blog and visit, maybe he or she thinks this post is good, maybe he or she will collect the post.and some is for the communication, maybe you can post your diary, and the visiter sill know your feeling, so you can talk to them. So that's two reason that I think why students should blog post?.