Flickr is a photo managing and sharing site, just about the best on the web. Basic accounts are free. You can upload pictures, and add descriptions and tags. Tags are searchable descriptive words that can be used to group photos in very dynamic ways. These searches bring up planned and impromptu exhibits, riffs on particular topics.
Searchable tags have made Flickr much more than just your personal online album. It's spawned a huge community of of picture sharers. You can interact with friends and total strangers, form groups with others of like interests, and in this era where everyone seems to have a camera handy at all times, watch huge news stories develop at the grass roots level. Global community--as close as your keyboard.