What is the purpose of ‘list’ function before the filter function?

What is the purpose of ‘list’ function before the filter function?
# Program to filter out only the even items from a list
my_list = [1, 5, 4, 6, 8, 11, 3, 12]

new_list = list(filter(lambda x: (x%2 == 0) , my_list))

print(new_list)