Comments I receive

Every day I logged in my ACP, I am flooded with too many comments.

I deleted all those with the links in their content. But I found some other copy-and-paste comments too, such like “You had some good ideas there. I made a search on the issue and noticed most peoples will agree with your blog”, from other blogs (wordpress, blogsome, blogspot…).

It seems no harm to my blog, and I know they hope to receive some traffic from my blog. Do I need to approve these comments?

Thank you!