It also categorises and places them in one of its respective lists.
This is a nice idea, but essentially useless. If the account sent out a tweet each time it verified somebody – much like @valebrity – it would absolutely be worth a follow.
As it is, because there is no easy way to search which users a given account is following, or to search within the lists of a given account – assuming that is you know who or what you’re searching for in the first place – none of this really helps you at all.
Incidentally, at the time of writing, and assuming this gauge is accurate, Twitter has verified 1,231 users. Against a network size of (at least) 25 million, that’s amazingly small. Looks like yet another half-hearted attempt at what is actually a good idea.