Inertia neither pushes nor pulls on an object. Inertia is the property of an object that resists changes in its state of motion. It is often described as the tendency of an object to "keep doing what it's doing." In other words, an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same velocity and in the same direction unless acted upon by external forces.
Inertia is a passive property and does not exert any force itself. It is not a force that pushes or pulls on an object. Instead, it is the force or forces acting on an object that can overcome or change its inertia. For example, if you try to push a stationary object, you need to apply a force greater than its inertia to set it in motion. Similarly, if you want to stop a moving object, you need to apply a force in the opposite direction to counteract its inertia.
In summary, inertia is not a force that pushes or pulls on an object. It is a property of an object that describes its resistance to changes in motion. Forces are responsible for overcoming or altering an object's inertia.