Salsa is not salsa without one of the signature salsa moves, spinning. If you're male (the lead) then you'll be doing fewer spins, whereas if you're the female then expect to be twirling around and around in your partner's arms.
As such, spinning is a really important skill to master. To learn how to do double and triple spins, check out this salsa video.
This salsa dance video lesson will encourage you to add multiple spins in your salsa dance patterns. A lot of dance follows like spinning, and taking your regular moves and adding double or triple spins in them will make them seem 'new' and more complex. This simple pattern will have your follow doing a double spin followed by a third free spin in place.