If you find your bike headset is too loose or too tight you need to adjust the bearing. Riding with a maladjusted headset will be more difficult and less comfortable and will wear out the bearing prematurely.
A threadless bike headset can be adjusted with simple tools.
Stand in front of the bike, facing the handlebars, with the front wheel between your legs and your head on the centre-line of the bike. Release the bolts that clamp the handlebar stem to the steerer tube and check it’s free by twisting it gently on the steerer tube. Never try and tighten the top-cap while the handlebar-stem is clamped on the steerer.
Final Check of the bike headset
Make a final check that the bearing is in the target zone.