A simple random floating click-through ad for my website

Here's an example of a simple random floating click-through ad for your website:

<style>
  .floating-ad {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #fff;
    border: 1px solid #ddd;
    padding: 10px;
    display: none;
  }
</style>

<div class="floating-ad">
  <h3>Don't miss out on our special offer!</h3>
  <a href="https://example.com/special-offer" target="_blank">Click here to learn more</a>
</div>

<script>
  var randomTime = Math.floor(Math.random() * 60000) + 60000; // Random interval between 1 and 2 minutes
  setTimeout(function() {
    document.querySelector('.floating-ad').style.display = 'block';
  }, randomTime);
</script>

In this example, the ad is a simple text message with a call-to-action link. The ad is positioned in the bottom right corner of the page using CSS, and set to display at a random interval between 1 and 2 minutes using JavaScript's setTimeout() function.

You can customize the ad text, link, and styling to match your website's branding and design. Note that this is a basic example and you may want to consider other factors, such as the placement, size, and frequency of the ad, to optimize its effectiveness.