This is one of many tests we’re conducting to determine once and for all, if Google is reading content that is on the page but not visible until the user takes some sort of action. In this test, we check if Google reads accordion text.
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Another hidden test in accordions, carousels, tabs. Accordions is one of those things. We just wanted to see when we got it or going to pop up, and yes, Google's reading accordions. People say don't do accordions, you're hiding stuff from the user. Well, it's a user interface function of your website. You want to just show the landing page but you want to hide all that other gobbledygook that you gotta put in there in order to appease the Google monster to rank your landing page but you want to keep your versions high.
You can do that by implementing accordions on your website with the users interacting with your accordions and they only interact with your sales page. You're not hurting anything. You're not violating some policies. It's there, they can click if they want to. If they don't want to then they don't have to read it but Googlebot sees it and Googlebot is really giving you credit for it so go to town using accordions.
That's a really good idea especially if you're doing stuff with the tools and you have to increase word count. Use accordions and hide that stuff. You already have a great converting page. You've tested it with PPC. You want to SEO it, use accordions.