A Mini Break occurs when a player wins a point when their opponent serves. This is most commonly used during tiebreaks.
Mini-breaks are important because they give players an advantage in tight situations. During a tiebreak, winning a mini-break can be crucial for victory.
Mini-breaks can also happen in regular games, but they're called "Breaks" in that context. In professional matches, commentators often highlight mini-breaks as key moments in tiebreaks.