An accordion section is a list of headers you can click to expand or collapse details. The details of the headers are all in text format, and they can be rearranged / re-ordered in the site editor.
Site collaborators can use this section to reveal or hide the details of the headers as the site visitors click on them. Common use cases where accordion sections would work best are FAQs and glossaries.
In these examples, the headers would be questions (FAQs) or terms, while the details are the answers to the questions or the definition of the terms.
The accordion section headers are collapsed by default, with the option to expand multiple simultaneously. These settings are controlled in the site editing interface.