Camera follow player

using UnityEngine;
using System.Collections;

public class CameraFollow : MonoBehaviour {
public Transform target;
 // The position that that camera will be following.
public float smoothing = 5f;
 // The speed with which the camera will be following.
Vector3 offset;
 // The initial offset from the target.

void Start ()
  {
   // Calculate the initial offset.
   offset = transform.position - target.position;
  }

void FixedUpdate ()
  {
   // Create a postion the camera is aiming for based on the
  offset from the target.
  Vector3 targetCamPos = target.position + offset;
   // Smoothly interpolate between the camera's current position
  and it's target position.
  transform.position = Vector3.Lerp (transform.position,
  targetCamPos, smoothing * Time.deltaTime);
  }
}