I saw a video of matt cuts, in that he said that tags can ruin your SEO. So use it properly because if we over do, it will become a keyword stuffing ? Plzz share ur views here
Yeah what video? MAtt Cutts says Google ignores meta tags! http://www.mattcutts.com/blog/keywords-meta-tag-in-web-search/
People are trying to help and other people's opinions should be treated with respect. It would also be beneficial for someone new like you to do a quick search around the forums first before prematurely posting random questions here. Your topic has been asked soooo many times and has been redundant as ever! If you want to know more then you can simple refer to this post on the SAME forum.
Use of tags are of great help if you want traffic for your website. when blogs are cached, the links used in the blog post will surely help you to grab some traffic.