My character is falling through the floor

Hey I watched a tutorial about player movement, so i copied the code but my character is falling endless.
Here is the code, I hope someone can help me.

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
public float MovementSpeed = 1;
private void Start()
{

}


private void Update()
{
var movement = Input.GetAxis("Horizontal");
transform.position += new Vector3(movement, 0, 0) * Time.DeltaTime * MovementSpeed;
}
}

 

If your character is falling, with this code, then it means you have physics on your character.

Look for a Rigidbody or Rigidbody2D component on the GameObject that represents the player, and remove it.

 

Thank you!!!