August Full Moon is traditionally called: Sturgeon Moon, Blueberry Moon, Wheat Cut Moon, Green Corn Moon. Those names are connected to agricultural activities (and fishing season) in the Northern Hemisphere.
On August 20, 2021 Jupiter, the largest planet in the Solar System was opposite the Sun (Jupiter, the Earth and the Sun were aligned) – that is why so perfect to observe from the Earth that night.
The name of the Strawberry Moon is connected to the harvest season of that berry in June. June’s Full Moon is also called Rose Moon or Hot Moon.