I'm no expert on this site, but most of what you want to know is found by clicking the links above, especially "About Us". More info can be found at Wiki: Anu Garg.
Since the founder of the site did not have English as his mother tongue, I'm pretty sure it's for learners as well.

I was inadvertently lead here by a member, not by the WOD. I sometimes ignore the WOD, even for a week or more, unless there is some interesting chatter about it on this board. I would have to say that these forums are the most interesting part of Wordsmith. In my "real" life there are few people who will, or can, go toe-to-toe with me about language. I love to debate, read others' opinions, look things up because of a post I find, and just learn so much in general from what I find here. There are mostly reasonable people participating, who mind their manners so we can all get along. This is not to say that there is no controversy, or even heated discussions, because both of those happen. But those things make this site interesting, and help build the community of users. All of the regular "posters" are important, necessary and welcome, and the whole community of this site is diminished when even one person leaves. I don't know if this is the information you wanted. Sorry if it's not! :0)