What is a simul?

I dunno what a simul is. Can anyone please tell me?

https://lichess.org/simul
Go here it is given

Simuls involve a single player facing several players at once.

The concept is taken from real world events. In real life, this involves the simul host moving from table to table to play a single move.

When the simul starts, every player starts a game with the host, who gets to play the white pieces. The simul ends when all games are complete.

Simuls are always casual. Rematches, takebacks and adding time are disabled.

Thanks guys. 😊😊😊