I often come across problems with English that cannot easily be answered with a dictionary. I usually ask people around me, but I tend to forget what I learned a few months later. Since this is a web-based database, from anywhere I can store tidbits that I learn. If I come across the same problem again, I can look it up, so I would not have to bother anyone about it.
It’s dry reading unless you have an interest in English grammar. I like the site’s name.