Tagging in the Clouds

I find the concept of tagging interesting, but I haven't used it in searches enough to judge its usefulness. I searched Great War, an era of history I'm interested in, and found a large tag cloud (18,000 hits) for an uncommon name for World War One.

I'm interested in how an author's experience in the trenches effected his writing and his moral outlook. Tolkien is one of my favorites, but I didn't find him through the tags. I found him the old fashioned way. Most of the tags led me to writers relating their direct experiences of the War. I'll practice some more and see if I can get better at using tags.