What is a task dispatcher used in ViewModelScope when working with coroutines?

The Dispatcher in ViewModelScope manages which thread or thread pool runs the coroutines. In Android, this is important for separating work between the main thread (UI) and background threads.

For example, Dispatchers.Main is used for updating the UI, and Dispatchers.IO for input-output operations.

ViewModelScope automatically cancels coroutines when the ViewModel is destroyed, preventing memory leaks.

Example usage:

viewModelScope.launch(Dispatchers.IO) {
    val data = repository.loadData() // Background operation
    withContext(Dispatchers.Main) {
        _liveData.value = data // UI update
    }
}