Gravity is a force that is pulling you and objects down to Earth, Gravity is an invisible force that pulls you and objects towards each other. Earth's gravity is what keeps you on the ground and what makes things fall once dropped. Like this picture for example a person is throwing a ballon in the air. The ballon will slowly come down due to it having air. But if you were to throw a phone in the air it would come straight down due to it's heavy materials.