how to make a object move in the direction it is looking unity code example

Example 1: unity movement on forward

transform.position += transform.forward * Time.deltaTime * movementSpeed;

Example 2: move in the direction that player is facing unity

float movementSpeed = 100f;

void Update()
{
	rb.GetComponent<Rigidbody>().velocity = transform.forward * Time.deltaTime * movementSpeed;
}