Uefa
In short
The Union of European Football Associations is the governing body for association football in Europe. It manages 55 national associations and organises major tournaments for men and women.
In plain words
UEFA is the organisation that makes the rules and runs the biggest football competitions in Europe. They oversee everything from national team championships to elite club tournaments.
A simple example
The UEFA Champions League is a famous tournament where the best clubs from different European countries compete for a trophy.
Why it matters
It ensures football is played fairly and consistently across the continent. Without UEFA, there would be no organised way to decide which European club or national team is the best.
Easy to mix up
Do not confuse UEFA with FIFA, which is the global governing body for all of football.