Glad you ask.
It is about decentralized finance: DE FI. vs CE FI CEntralized FInance where traditional way to earn.
In a few word it is a way you stake token like bitcoin, ether, polkadot, many more and you will earn interest
according to the platform you stake your token with.
Hard to give you a full explanation in a comment but you can
see where I am heading.
Follow the tribe leofinance.io where you can scroll back to many posts and see a little bit
before March how https://cubdefi.com starts.
You can exchange hive to leo to bleo and start earning Cub token through
this defi platform supported by leofinance community.
We called it second layer on top of Hive blockchain.
Hope I am not giving you a river of info.
Take it slowly and get accustomed with it.

!BEER