Copying or duplicating a gameObject from one scene to another

I wanted to copy an object “A” from Scene 1 to Scene 2 such that if a make any changes in the object properties(Eg. SpriteRenderer) in any of the scenes, it effects the other copy from the other scene as well.
I am a newbie please help me, i am totally stuck here since 2 weeks.

Thank You

These are called prefabs , simply drag the gameobject into the file inspector , then drag that prefab into the other scene , then if you make changes to the file simply click apply prefab , for more info watch this