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Bootstrap 5 Collapse
Collapse is a feature that helps hide and show content when clicking a button or link.
Usage: Use the collapse class on the content to hide, and use a button with the data-bs-toggle="collapse" attribute to control it.
Benefits: Makes the web page look organized, allows easy access to additional information, and is mobile-friendly.
Collapse helps keep web pages clean and lets users view extra information only when they click the button!

In this code:

We use the container and mt-3 classes to make the content look neat and add some space at the top.
The button with data-bs-toggle="collapse" controls the visibility of the content inside the div id="demo" which is hidden when the page first loads.