[Yu-Gi-Oh! Master Duel] What are lifepoints?

I havent played this games in so long... I'll only duel a viewer once! BGM: Massobeats - City    • massobeats - city (royalty free lofi music)   Rules: Be nice and respectful Ignore suspicious accounts Have fun Mild Backseating No spoilers Holo-Chronicles Topics Allowed Questions Allowed Keep the topic in the context of the stream. I like to yap