hello all, I don't know I got 7 comments and all are spam. what is this ?
Most likely some idiot using some auto posting software to submit mass spam comments online and they found your blog.
Easy way to stop this is search for a captcha plugin because most auto comment software can't get past that.
More advice and good tips on this blog post.
yes sure brother. can you suggest me best tool...?
As mentioned in the blog post, my pick is WP-SpamShield Anti-Spam.
Read about all of them and pick which one you want to use. Try them all out.