What is the process to replace an aerator in a kitchen faucet?

To replace an aerator in a kitchen faucet, first, unscrew the existing aerator from the faucet spout using pliers or a wrench. Then, clean the threads on the faucet spout to remove any debris. Next, apply plumber's tape to the threads of the new aerator to create a tight seal. Finally, screw the new aerator onto the faucet spout and tighten it securely.