In the mobile view of a Wikipedia page the "navigation box(es)" (also known as NavBox) at the bottom of articles are not shown. I don't mean 'collapsed by default', I mean that they are literally not there at all.
This is a piece of the content of an article that is being hidden from users. [equally, article categories aren't shown, but that's a different story]. Considering that the mobile team is develping the "Related articles" feature to automatically highlight relevant further reading, it seems counterproductive to deliberately hide the manually curated collections of related content that go with many articles.
The bottom of the mobile article "The Old Vic" https://en.m.wikipedia.org/wiki/The_Old_Vic goes from the 'external links' section straight to the 'talk' and 'other languages' mobile links.
Whereas the desktop version of the same article https://en.wikipedia.org/wiki/The_Old_Vic has a "Theatres in London" navigation box (shown in a 'collapsed' state by default). https://en.wikipedia.org/wiki/Template:Theatres_in_London
- SEO T198949
Outcome from 2018 SEO project with Go Fish Digital:
The navboxes at the bottom of articles are good for search engine rankings, as they improve the link equity of the other pages. This is true even if the links are collapsed by default (which they are on desktop), and also true even if the links themselves are in the HTML but not visible to the user.
Navboxes were removed from the mobile view because the nature of the tables meant they weren't very useful to users, and removing them also reduced page weight. Search engines like Google are increasingly switching to mobile-first crawling, and not having these links present is bad for link equity.
There's a tradeoff here: page weight and good performance are taken in to account by crawlers, but so is the presence of these links. If adding the links back in (but not necessarily displayed to the user) doesn't have a large performance impact, then they should probably be put back.