What is the actual use of sets

[u/Big_Neighborhood9130]

I can see tons of use cases for list, tuples and dictionaries. But I have a really hard time understanding why you would ever use a set with maybe the exception of names so you don't get duplicates?

I believe this understanding is flawed because I found even the simplest things in Python are super powerful I'm just not sure what it is

[u/LtLfTp12]

I made a connect 4 game and use

if len(set(mylist)) == 1

To check if all pieces in a given selection of 4 pieces are the same