CAN ANY ONE EXPLAIN IN DETAILS, HOW INTEREST IS EARNED.?

Hello to all of you who will be reading this, I want to start by thanking all of you, For reading this! I been in steemit for one week as you can see my content writeing is not good.

May major concern is regarding interest, as a "Muslim we are not alloud to consume, Interest. Can someone tell me how much of what we earn is generated from interst.