Click on the Section title, Accordions to open up the section...
...then click on Add Accordion to create a new Accordion.
Add a Clickable Title. This is the text that will appear on the collapsed accordion in a blue bar with a green plus sign. Add your content into the Text field. The Text will be hidden until the visitor clicks on the blue Clickable Title.
If you need more text that follows after the list of blue Accordions, you may add optional text into the Text After Accordions field: