Omni is a protocol built as a layer over Bitcoin that allows you to generate, send, trade, redeem digital tokens. Its smart contract abilities allowed users financial tools like paying dividends to and make bets with tokens representing various assets.
The OMNI asset is the first asset on the layer, it gets the fees from the layer’s trustless exchange, and it can transform into any currency using smart contracts on the layer.
Instead of just sending Bitcoin around, you would use OMNI to send a tiny amount of bitcoin that acts as a stamp, and that transaction forever stands for the transfer of some Omni layer property.