Source: http://www.engadget.com/2013/12/13/googles-launches-tips/
Though we're sure Google tries to keep its products like Now and Docs as easy to use as possible, who has the time to learn every single feature? That's likely why Google just launched Tips, a site that uses its info card trope to help you dive more deeply into all 13 of its consumer products. For instance, a card for Google+ suggests you can "make your still photos not so still" and reveals a tutorial for supported devices when you click it. You can even submit your own idea for a tip, though you'll need a Google account for that and other functions. It's only available on desktop browsers for now, but if you want to give it a spin and see all the supported products, hit the source.
Source: Google Tips