I use wordpress as a blog and used a plugin that allows to add my own tags to each article. Like say my article is http://www.mysite.com/articleid/articlename/ and in that article content, i have links to http://www.mysite.com/tag/tagname/ Will having these tags improve my site with search engines, in otherwords is having them a good thing or bad thing?
In my honest opinion, I would not worry about them. Search engines like Google have goals to make their rankings the best for HUMANS. Eventually they'll work out the kinks that people use to "cheat" their algorithms. Keeping that in mind, tags are ugly and almost useless. Right now, you may get little seo weight because of the H1 and H2 tags being used... but nothing substantial. It's not a bad thing, but I don't think it's worth it.