This seems like a useful enough tool, but, good God, could they have picked a worse name? It doesn't rank for "typedef" on the first page of Google, and, while it does rank for "typedefs", it's in the middle of a bunch of stuff that is mostly explaining how typedefs work in C or C++.
It's reasonably easy to pick the thing that's related to computing if Google only shows a page of stuff that is obviously not programming-related. But, this is most likely going to get lost among the other computing-related items.