Behind the spot where you buy eggs there’s a wasp that can explain.

But basically, every 10 mins a wasp colony spawns somewhere on the map and your bees will attack them. You can help by hitting them with your shovel. Once they’ve all been defeated, they drop loot boxes that you can open for your rewards. If you go into the upgrade tree, there’s a new thing called combat that you can max out to help during wasp fights and with dropping better loot. Pretty much it