What is the purpose of the find_in_set function in SQL?

The find_in_set function is used to search for a specified value in a comma-separated string list. It takes two parameters, the first one being the value to search for, and the second one being the comma-separated string list containing the values. If the specified value is found, it returns the position of the value in the list; otherwise, it returns 0. This function is commonly used to check if a value exists within multiple values stored in a specific field.