How do tiebreaks work ?

How do tiebreaks work ? Well I am asking you guys to answer that for me because I do not know !

Tiebreaks here or in US Chess tournaments?

There are literally dozens of different tiebreak methods. It is event-specific - what event are you asking about?

As others have noted, there are a variety of tiebreak systems used in chess tournaments. Which one(s) are used, and in which order, is up to the tournament organizers. This article is fairly informative. https://en.wikipedia.org/wiki/Tie-breaking_in_Swiss-system_tournaments

If each person gets points from the person they beat, they get points for the tiebreaker.

Always wish every opponent you beat good luck for the rest of the tournament, because that's where your tiebreak points come from.