There are multiple ways to earn points which you can then exchange for items in the shop. All points must be exchanged to wallet credit before using the shop.

Watching Videos
You can earn points by watching videos in the background. For every 3 advertisements that are shown to you, you will earn points.

CPU Mining
Using a small amount of your computers processing power will earn you hashes which you can use to exchange for gold coins.

Pool Mining
Using the same process as CPU Mining, you use a small amount of your computers processing power, however you are actually mining into a pool (Monero Ocean) and you are mining Monero (XMR). You will need a Monero wallet to receive payout such as MyMonero.