What are the main differences between gold coins and sweeps coins in online sweepstakes casinos?

Can someone explain in plain english what are the main differences between gold coins and sweeps coins in online sweepstakes casinos? I don’t get why they have 2 currencies.?

Gold coins = play money. Sweeps coins by= redeemable for cash. Full explanation with examples here: https://spintalk.org/t/best-sweepstakes-casinos-for-us-players-in-2025-free-play-real-prizes-and-instant-cashouts/2670”

I treat gold like practice mode. Sweeps is what I save for redemptions." P

@gogetamil0420 explained it right. Took me a while to figure that out too.

Most casinos give you daily sweeps coins for free which is pretty cool. Those are the ones you can convert to real money.