MetaMask gives you options to connect to different networks depending on your circumstances. While the default network is the Main Network (Ethereum’s main net that we are familiar with), we can connect it to one of the test networks.
Once such test network is the Ropsten test network and is a great way to test out things without spending actual ether.
Just follow the steps given in the GIF below to change your MetaMask network to Ropsten. (Make sure MetaMask is unlocked before you do this)
That’s all folks!
Draft White paper: here