Thing 21

I think tagging is very important with photo-sharing sites because it allows people to find photos that interest them. This is one way that communities build on Flickr. People with similar photographic interests can communicate and share with each other. It's very interesting to search by keyword on Flickr and see what's out there. Could be handy as a source for photographs to use for library purposes, with permission, of course. And I love the way members friends and families can communicate with each other on the site. Very innovative!