Questiion about the principle of Unit Kotlin

I am new to Kotlin and I have question as I dont fully understand the principle of Unit:

onChecked:(Boolean) -> Unit

Does it pass the certain data as parameter to other function ( as a Unit)?

>Solution :

(Boolean) -> Unit is a function type. Before the arrow are the parameters, in this case a Boolean and after the arrow is the return type. Unit simply means that it doesn’t return anything.

See also this documentation