NEWTONIAN GRAVITY
According to Newton's law of gravitation every mass attracts every other mass in the universe, and the gravitational force between two bodies is proportional to the product of their masses , and inversely proportional to the square of the distance between them. This was the idea proposed by the Newton on the gravity. Newton said that force of the gravity is always attractive and has an infinite range. Most importantly the force due to the gravity affects everything with the mass .

EINSTEIN'S GRAVITY
While working with the general theory of relativity, Einstein combined the three dimensions of space and the one dimension of time into a single concept of , which he called as the Space-time.
Assume the Space-time as an elastic sheet which on applying the force get's bend /deform / or get disturbed under the weight of the object placed upon it . The more will be the weight of the object the more deformation will be there on it. This bending/deformation/ disturbance is called as the gravity.

so , Newton considered gravity as a pull whereas Einstein considered gravity as a push.