what happens in a tournament when two people have exactly the same amount of wins, and what does 'tie' mean?

Tie means the scores are equal. Example player aaa got a score of 4 points and player bbb got a score of 4 points also. So these players are tied or in a tie.

Usually in a tournament the tournament director will assign a so called tie-break system. Example in round-robin tournament, there is this Sonneborn-Berger tie-break system where you sum up all the scores of opponents that you defeated, and add half the score that you have drawn. For tied players the highest Sonnebord-Berger points will win the tournament.

There is also a case where a tie is broken by the most number of wins. The player with the most number of wins will win.

thank you! :)