As accordion is an excellent example of Mini-IA (Miniature Information Architecture), the Accordion style has its own reasons to be called the most established workhorse in responsive design.
- It reveals information upon a tap or clicks from the highlighted important detail.
- The approach of Wrapping complex content under a heading for the section minimizes page size. 
- Reduced page or in other words hiding some of the content can make the webpage looks less daunting.
- In some cases, depending on the use of the design, accordions conceivably a better alternative to internal page links.
- It is fun and fabulous.

Read more on accordion for mobile : https://www.nngroup.com/articles/mobile-accordions/