keyboard keys

Try cleaning the keyboard by using the instructions in this Apple article:

https://support.apple.com/en-us/HT205662

Make sure to keep the can of compressed air fully upright or you can cause damage to the laptop since the extremely cold wet propellant will spray out if the can of compressed air is tilted.

If you have a 2015-2019 USB-C Apple laptop, then your laptop qualifies for a free Apple keyboard repair program if cleaning the keyboard with compressed air does not work and the laptop is less than four years old:

https://support.apple.com/keyboard-service-program-for-mac-notebooks

FYI, here is the current list of the publicly acknowledged free repair program for various Apple products (some products have multiple programs):

https://support.apple.com/service-programs