"The term was invented by Darcy DiNucci in 1999 and later popularized by Tim O'Reilly and Dale Dougherty at the O'Reilly Media Web 2.0 Conference in late 2004." [1]

[1] https://en.wikipedia.org/wiki/Web_2.0

From the same article: "Whether Web 2.0 is substantially different from prior Web technologies has been challenged by World Wide Web inventor Tim Berners-Lee, who describes the term as jargon. His original vision of the Web was "a collaborative medium, a place where we [could] all meet and read and write." On the other hand, the term Semantic Web (sometimes referred to as Web 3.0) was coined by Berners-Lee to refer to a web of content where the meaning can be processed by machines."

only the wiki entry you quote has this to say about Web 3.0:

On the other hand, the term Semantic Web (sometimes referred to as Web 3.0) was coined by Berners-Lee to refer to a web of content where the meaning can be processed by machines.

Dapps advocates decided to squat the “Web 3.0” name at some point without asking any web people AFAIK. Indeed the technology usually isn’t even HTTP/WWW-based, so calling it Web x.y is kind of a head scratcher. An uncharitable take is to piggyback on an actually successful technology (despite not having much semblance) to lend themselves legitimacy.

A sibling comment claims that it’s Web3, not Web 3.0 (as if it’s meaningfully different), but “Web 3.0” has definitely been used a lot by dapp advocates; evidence abound. Maybe they have since decided that “Web 3.0” is a tad too ridiculous and is now rallying under the “Web3” banner instead. I wouldn’t know.

Web3 (not Web 3.0) is how browsers communicate with the data that is not hosted on a web server, but rather on a decentralized blockchain. This means that these things are resistant to censorship.

I rememeber web 2.0 was supposed to be when normal users startet providing content. So like ... after year 2000 somewhen?

ummm yeah actually you did. google "web 2.0 the social web" and maybe you can catch up :)