Recently the functionality for bookmarks was completely overhauled and they are now called saves: Bookmarks have evolved into Saves. It is expected that eventually there will be some questions about saves here on meta - we had quite a lot of questions about bookmarks too.
I think that it is reasonable to have a tag which makes them easy to locate. For this reason I have recently created the tag saves. (Of course, a possible outcome of this discussion might be that we don't want this tag - if that's the case, we can simply remove it.)