In Kotlin, there are two types of lists: immutable lists and mutable lists. Immutable lists cannot be modified after they are created. They are created using the listOf() function. For example: val immutableList = listOf("a", "b", "c") Once the immutable list is created, you cannot add, remove, or change any of the elements in the list. Mutable lists, on the other hand, can be modified after they are created. They are created using the mutableListOf() function. For example: val mutableList = mutableListOf("a", "b", "c")