Google’s John Mueller recently spoke about content hidden behind tabs or Click to Expand content:
“If we can recognize that the content is actually hidden, then we’ll try to discount it a little bit. We see that it’s still there, but the user doesn’t see it; therefore it’s probably not something that is critical for this page. That includes the ‘click to expand’…[and] tabbed URIs — where you have all kinds of content hidden away in tabs, those kinds of things. So if you want that content indexed, I’d make sure it’s visible for the users when they go to that page.”
I’d recommend that you make sure important content is not hidden within ‘Click to Expand’ tabs or menus – especially on the Homepage. Important text needs to be visible all the time if you want to keep or improve your site/keyword ranking.