This Seeking Tech guide will explain how you can earn, as well as give, toasts in MultiVersus.
For the uninformed, Toast is an in-game currency that you can give to other players after an online match. In order to earn it, you simply have to log into your account in MultiVersus. You will be able to earn 5 toasts daily by doing so.
If you want to toast someone, finish a match and then decline a rematch with the other player. Afterwards, you should be able to find the Toast option underneath their username in the Results screen. The number of toasts you have should appear on the top-right corner of the same screen as well.
By toasting another player, you will be giving them Fighter Currency. This is another type of in-game currency, which is used for unlocking playable characters.