Why tagging is important

I always wondered why tags are so important and why does everyone talk about it so much, but once I started using it, I have found it very useful it helps in organizing the stuff and also if we use the tags in a very appropriate way, it also ensures that search engines pick the right tag and in a way tagging the title appropriately makes it a good SEO practice, also unnecessary tagging also doesn't help the cause.

Wayne Hurlbert has written a good article on title tags, I think spending 10 minutes reading the article is worth the salt.

There is so much to learn :)