No private internet providers and websites; instead the internet is treated as a public utility, with a few government-run sites offering services to the public (weather reports, news, stock market info, online encyclopedia, a few educational sites, this sort of thing). Interestingly, that‘s basically how the internet looked like on early smartphones, where you only had access to special mobile versions of a few select websites, except in this case that‘s how it would be everywhere, not only on early smartphones.
With such a restricted internet, social media as we know it never becomes a thing. Smartphones with touch screens will probably still be invented sooner or later, since the control scheme is simply too convenient to ignore in the long term, but without social media they‘re unlikely to become such a central aspect to people‘s lives.