The Quad-CPU Raspberry Pi Zero 2W is a pretty powerful beast for its size. However, if not properly cooled it will throttle its CPUs at about 80 deg C: https://raspberrytips.com/raspberry-pi-temperature/

This fan assembly helps you to push the Zero 2W to its limits, in particular if you run it at ambient temperatures above 30 deg C or apply overclocking. It fits the Zero W and the Zero as well. It offers a range of printing and fan mounting options.

Running the fan continuously is straight foward. I added an electronic temperature control circuit and associated "on/off" Python software to extend ist lifespan and reduce average prower requirements. While a heat sink isn't mandatory, it does seem to reduce the on/ff frequency due to its thermal capacity.