startbootstrap/_includes/footer.html

<footer>

  <div class="mt-5">
    <div class="container text-center">
      <p class="lead">And now, a word from our sponsors...</p>
      <div class="row">
        <div class="col-lg-8 col-md-10 mx-auto">
          <div class="bsa-cpc"></div>
        </div>
      </div>
    </div>
  </div>
  <script>
    (function() {
      if (typeof _bsa !== 'undefined' && _bsa) {
        _bsa.init('default', 'CKYD6KQU', 'placement:startbootstrapcom', {
          target: '.bsa-cpc',
          align: 'horizontal',
          disable_css: 'true'
        });
      }
    })();
    // Function to check whether there are any ads are visible. If not ads are loaded, hide the container.
    window.onload = function() {
      if (document.getElementsByClassName("_default_").length > 0) {
        document.getElementsByClassName("bsa-ad")[0].style.display = "flex";
      }
    }
  </script>

  <div class="footer-social my-5">
    <div class="container">
      <div class="d-flex justify-content-center">
        <a class="footer-social-link d-inline-flex mx-3 justify-content-center align-items-center text-white rounded-circle shadow btn btn-github" href="https://github.com/StartBootstrap">
          <i class="fab fa-github"></i>
        </a>
        <!-- Slack - disabled for now -->
        <!-- <a class="footer-social-link d-inline-flex mx-3 justify-content-center align-items-center text-white rounded-circle shadow" href="https://startbootstrap-slack.herokuapp.com/" style="background-color: #3eb991;">
          <i class="fab fa-slack"></i>
        </a> -->
        <a class="footer-social-link d-inline-flex mx-3 justify-content-center align-items-center text-white rounded-circle shadow btn btn-twitter" href="https://twitter.com/sbootstrap">
          <i class="fab fa-twitter"></i>
        </a>
        <a class="footer-social-link d-inline-flex mx-3 justify-content-center align-items-center text-white rounded-circle shadow btn btn-facebook" href="https://www.facebook.com/StartBootstrap/">
          <i class="fab fa-facebook-f"></i>
        </a>
      </div>
    </div>
  </div>

  <div class="footer-main bg-dark py-5 small">
    <div class="container">

      <a href="/about">Start Bootstrap</a>
      is a project created and maintained by
      <a href="http://davidmiller.io">David Miller</a>.

      <br>

      Themes, templates, and snippets licensed
      <a href="https://opensource.org/licenses/MIT">MIT</a>, Start Bootstrap website
      <a href="https://creativecommons.org/licenses/by-nc/4.0/">CC BY-NC 4.0</a>.

      <br>

      <a href="/terms-and-conditions">Terms &amp; Conditions</a> - 
      <a href="/privacy-policy">Privacy Policy</a>

      <br>

      Based on
      <a href="http://getbootstrap.com">Bootstrap</a>.

    </div>
  </div>

</footer>