When a user opens an accordion, this should be tracked so we can see which accordions are clicked the most. This would enable us to address issues that may exist in the product.

For example, I have a sort-of Frequently Asked Questions page. If one or two FAQs get opened a lot more than the others, it indicates that I should either create a dedicated page, or feed this data back to our Product/UX team so they can improve the product.