Collapsibles

Collapsible sections can be usefull to compress a lot of information into a small space that users can visually scan in a quick way.
If users want more information, they can expand a specific topic without being burdened by all other content.

FAQ Collapsibles

Although collapsibles can be used to organise many sorts of content, for FAQ's it should be used without exception.
Collapsibles by default are in the collapsed state, with all content closed.
A chevron informs users on the state of the collapsible; pointing down when collapsed, pointing up when expanded.