Unity ads problem for mobile

Hello everyone, I'm using the Unity plugin for Circus (Unity ads) I put the script when the game starts. The problem is that if the text on the computer is working properly. It makes me see what it looks like advertising. If I try it on android is like the main room there was no script attached and I do not run anything. These are the two sample screens. You know you help me?

this is on pc

and this is on android

 using UnityEngine;
  using System.Collections;
  using System;
  using System.Collections.Generic;
  using UnityEngine.Advertisements;
  
  void Awake()
     {
       Advertisement.Initialize("*****");
     }
  
 void Update()
 {
 if(Advertisement.isReady()){
           Advertisement.Show();
 }
  
 }