Bir örnek:

<!-- JQUERY KÜTÜPHANESİ -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js" integrity="sha512-894YE6QWD5I59HgZOGReFYm4dnWc1Qt5NtvYSaNcOP+u1T9qYdvdihz0PPSiiqn/+/3e7Jo4EaG7TubfWGUrMQ==" crossorigin="anonymous"></script>
<img src="ad.png" class="ad">
<button class="gizli btn">BUTTON</button>
<style>
    button.gizli {
        pointer-events: none; /* Bunun sayesinde tıklanmaz yapıyoruz */
    }
</style>
<script>
    $('ad').onclick(function(){
        $('btn').removeClass('gizli');
    })
</script>