I'd argue the web is the Fediverse. You access instances called websites, some of which are controlled exclusively by one person and some of which allow you to

I'd argue the web is the Fediverse. You access instances called websites, some of which are controlled exclusively by one person and some of which allow you to post on them. The websites all communicate with each other via a protocol called a hyperlink, but they may choose to use richer content sharing protocols at their discretion, and can also block certain hyperlinks or entire instances deemed unsuitable for their website. Websites' moderation policies vary from only one person having write access to allowing users to write and link to what they want alongside content syndicated from other fully independent websites, and users can visit many websites, and be as selective as they like about following hyperlinks. Turns out people really like the big monolithic websites with the most users though...