What is the big deal about tags? You can tag photos, you can tag blog entries, and you can even tag your bookmarks. What is the point of tagging?

I have just written the tag code for GITI. It is universal code that can be used by all modules for interacting with the GITI Tags table. Presently it is implemented by the Cookbook module in two forms. I am implementing it for “standard” recipe tags, as well as “meal tags” for associating recipes with meals or days. It is presently a very simplistic implementation, but from what I can tell, tags are very simple. I think this works for now, but I am trying to remember why I added the ability to tag these things.