Your tyre pressure depends on so many factors – total rider & bike weight what surface you’re riding on what tyres you’re using and more.
If you pump up your tyres too hard you won’t have any grip on loose surfaces.
Likewise if you don’t have enough pressure in your tyres you run the risk of pinch flats the tyre feeling wobbly and bendy when cornering or the rim banging against the ground when you roll over roots.
It might take a bit of trial and error to find your perfect pressure.
If you’re experiencing any of the issues above then stop immediately and add or remove a bit of air accordingly.
When you’re doing this however never go outside the manufacturer’s recommended tyre pressure range printed on the side of the tyre.