How can I make a button unfold a hidden part of the webpage (see more button) ?

Hi people !

I'm making my first website with Wix, and I'm trying to have hidden sections that visitors can unfold if they want, as to not clutter my page ( see example here : https://imgur.com/a/PYVqCAx , taken from https://support.wix.com/en/ ).

Could anyone help me out ?

Thanks in advance !