Anchor links with smooth scrolling like on the FAQ page

Hi On the Minicorp template you have a feature that will jump slide to a target headline on the page it is featured on your FAQ page..

Halfway down you have six buttons
“Design, HTML, JS/Jquery, PHP, WordPress, IshYoBoy,”
if you click one of them it gracefully slides/jumps to the section can you explain how I can implement this feature into my design. I would really like to utilise this feature but can not figure this out.

I only have basic knowledge and only want to use it to scroll down the page to the next section

So if you could explain it in a basic form that would be great help

Thank you In advance