To add a fixed footer using Bootstrap, you can utilize the "fixed-bottom" class. This class ensures that the footer stays at the bottom of the viewport, regardless of the content height.

<!-- BEGIN COPY / PASTE -->
        <footer class="bg-dark text-white text-center fixed-bottom py-3">
            Fixed Footer Content
        </footer>
        <!-- END COPY / PASTE -->

1. The "fixed-bottom" class makes the footer stick to the bottom of the viewport.
2. Use "bg-dark" and "text-white" for styling the footer with a dark background and white text.
3. The "py-3" class adds vertical padding for better spacing.
4. Ensure that your content above the footer does not overlap by adding appropriate bottom margin or padding to the main content area.