The game has you in the role of a god controlling a primitive village. Aside from shaping the land to allow for more habitable areas for your villagers, you'll bless your them with an abundance of crops or punish them with fire as you see fit. While you don't control their actions directly, as you would in a strategy game, your decisions affect the game world drastically.
The game had its origins on Kickstarter. It received a lot of attention due to the fact that it's the latest from Peter Molyneux, the creator of franchises such as Fable and Dungeon Keeper. He also made Populous, the very first god game ever to which Godus is the spiritual successor.
Much like most games on mobile nowadays, Godus is free-to-play. The in-app purchases range from a surprisingly high Rs. 308.63 to an even more astronomical Rs. 6,184.38. These let you do a variety of things such as speeding up the shaping of the land to upgrades to allow for better resources. While you don't need them to enjoy what Godus has to offer, they do help you progress faster if you choose to use them. You can check out Godus for Android here.