How does the atmospheric pressure relate to the weather condtion?

Question

Please I just need a simple answer

I mean like why is the the air nicer when the pressure is higher (generally speaking anyway)

Answer 1

Pressure systems are responsible for most weather conditions on the earth.Variation of pressure only causes air to flow horizontally from high pressure areas to low pressure areas and then forces them rise vertically over the low pressure areas as convection current .This raising air cools,condenses and form clouds which produces rain ,thunder storms,tornados,hurricanes etc.
Thus atmospheric pressure variations are the causes for many weather conditions.

Answer 2

high air pressure in a region indicates fair weather while low pressure indicates that storms are more likely