I'm working with some pages that are only partially visible because most of the content is behind a paywall. In order to help the page be discoverable in organic searches, I am in the process of manually combing through each article, grabbing keywords from it, and putting those into a list at the top of each article page. I don't know how useful it would be to visitors to see that list, so I am considering putting it inside the
<details> tag, so that it becomes visible only after the
<summary> tag is clicked. But since that requires a step of interaction, I wonder if search engines will miss it. Or maybe that is the best way, because the list won't take up space and annoy visitors (but hopefully the content inside
<details> will still be scanned). Or then again, is it possible the pages will be penalized for having keywords that are hidden until made visible?
From an SEO perspective, how does Google Search interpret content inside
I want to help the articles be discovered, but I can't simply show the content that is behind the paywall as-is.