The topic of hidden content in tabs is something we've covered a few times.
In short, Google's John Mueller said several-months ago that Google won't index the content found within hidden tabs. But SEOs and Webmasters said they would. It might be more that they weight that content less than visible content.
But this morning, Gary Illyes added a bit more detail on this at Stack Overflow saying that Google "won't see the content behind tabs iff the content under the tab is dynamically generated (i.e. not just hidden)."
That means that when you click the tab, then the content first starts to be rendered, Google won't see it.
This question comes around using Bootstrap tabs to dynamically generated content in those tabs on click.
Gary Illyes from Google said:
No, we (Google) won't see the content behind tabs iff the content under the tab is dynamically generated (i.e. not just hidden).You can also see what we "see" using Fetch as Google in Search Console (former Webmaster Tools); read more about the feature in our post titled Rendering pages with Fetch as Google.
Forum discussion at Stack Overflow.
