Pokémon GO on Niantic Site

Niantic Labs are the creators of the Pokémon GO app, and they have a subsection of their site dedicated to it.  Here you can see some cool updates about the app itself, like it being released in other countries!  You can also submit a support request or look through the FAQs.

Pokémon GO Homepage

There is lots of good info on the official Pokémon GO website: You can find out about all sorts of stuff in the game and get some good, high-level info.  It’s also the first place to have the trailer (aside from YouTube):