Question about the parameters of :GetAsync() and :SetAsync()

Hello, I’m trying to make a game, and it saves progress every time, but I don’t understand the parameters of GetAsync() and SetAsync(). I can’t access the dev hub right now for some reason, any help would be appreciated!

The difference between two are pretty clear once you have thought about it for a while. The parameter get async will get the current async that was set to the user id / index. Set async would allow you to alter the async of the chosen index to new value you have chosen to set.
To Give more clarity: Get Async is commonly used to get the last time a players data was updated before they left and Set Async would be used right after they have earned more in their amount.