Conference League
In short
The UEFA Conference League is the third-tier European football competition for club teams. It features clubs from across Europe that did not qualify for the Champions League or Europa League.
In plain words
It is a big tournament where football clubs from many different countries play against each other. Smaller teams get a chance to play on a European stage and win a trophy.
A simple example
A club from the Belgian league might play against a team from the Greek league in the group stages. The winner of the final tournament receives the trophy and extra prize money.
Why it matters
It gives more clubs the opportunity to compete internationally and earn money. It also helps grow the popularity of football in smaller nations.
Easy to mix up
Do not confuse it with the Europa League, which is the second-tier competition and generally features stronger teams.