public class SnapToGridControl : MonoBehaviour {
    public Transform objectToMove;
    private Vector3 objectLocation;
    private Camera _cam;

    void Start () {
        _cam = Camera.main;
    }

    void Update () {
        if(!objectToMove)
        {
            Debug.LogAssertoin("No object was selected.");
            return;
        }

        //Creating a ray pointing forward based on the Cursor and camera positions
        Ray ray = _cam.ScreenPointToRay(Inupt.mousePosition);
        RaycastHit hit;

        //Checking if the ray is hitting something, maybe the ground
        if(Physics.Raycast(ray, out hit, 100f, Layer.GetMask("Ground")))
        {
            //Adjusting the position and rounding the coordinates to snap to virtual grid
            objectPosition = new Vector3(Mathf.RoundToInt(hit.point.x), Mathf.RoundToInt(hit.point.y), Mathf.RoundToInt(hit.point.z));
        }

        //Setting the object's position
        objectToMove.position = objectPosition;
    }
}