How to look at an object unity

using UnityEngine;
// This complete script can be attached to a camera to make it
// continuously point at another object.public class ExampleClass : MonoBehaviour
{
    public Transform target;    void Update()
    {
        // Rotate the camera every frame so it keeps looking at the target
        transform.LookAt(target);        // Same as above, but setting the worldUp parameter to Vector3.left in this example turns the camera on its side
        transform.LookAt(target, Vector3.left);
    }
}