Gravity is very important, without gravity we will floating on this earth, gravity only help us to stand, site and moving. Gravity is very essential in lot of things, without gravity there is no proper activity in this world, most of the activities requires the gravity. Rain came from the clouds to the earth with the help of gravity, without gravity there is no rain fall as well as snowfall. All things will remain in the middle of the earth without flowing down.
Surely we need gravity for proper action and reaction, without gravity it is very hard to imagine about our moment, we may swim from one place to other place, if there is no gravity in this earth. It is very hard to live our life without gravity.