What is the purpose of dividing collections in Kotlin into mutable and immutable types?

In Kotlin, collections are divided into mutable and immutable to ensure safety and predictability of the code. Immutable collections guarantee that their contents will not change after creation, helping to avoid errors related to unintentional data modifications, especially in a multithreaded environment. Mutable collections are used when it is necessary to dynamically change the contents. This separation improves code readability and reliability by explicitly indicating the developer's intentions.