Set collection

A Set collection in programming refers to a group of unique items stored together, where each item appears only once. Think of it like a collection of distinct keys or labels; there are no duplicates. Sets are useful for quickly checking if something exists within them or to perform operations like finding common or different items between multiple sets. They are commonly used in situations where uniqueness matters, such as managing a list of unique user IDs or tags. Sets are efficient for membership tests and ensure that each element is stored only once.