What are barre chords and how are they played on the guitar?

Barre chords are a type of guitar chord where a single finger presses down multiple strings across the fretboard. To play a barre chord, you use one finger to press down all the strings at a specific fret, while using your other fingers to form the rest of the chord shape. This allows you to play chords that can be moved up and down the neck, giving you more versatility in your playing.