It may seem like an unimportant addendum, but using WordPress tags in a clever way can boost your site’s ranking and actually give it other avenues to draw traffic from.  I often times uses different combination of similar words in my tags.  This is important because every time there is a new tag, your site gains a new page.  This page is semantically related to your post or posts, bolstering your site’s authority in a given area.  Now one cannot over do this, but if you take a look at the tags for this post, you’ll get an idea of how to use this technique.

One other thing to remember is that the more often you reuse tags, the more content is placed on the tag page.  This will actually give that page some power.  I often have a  tag page rank before some of my individual posts or deep pages.

Happy Tagging.