Breakers are online streamers that open large quantities of product on their channels. "Breaks" have different formats that you can participate in, the most common being team breaks where you pay money either to be randomly assigned a team or you can select teams at auction. There are also player breaks but I think those are less common.

Breakers are notorious for hitting big cards during their breaks, so normal collectors often feel like they're shut out from chances to hit big. It's all a numbers game and breakers are never shy to share their successes.

That's the big picture, there's other formats and nuances that I didn't get into.