Web 1.0 is any website with the doctag <!DOCTYPE HTML PUBLIC "-//SoftQuad Software//DTD HoTMetaL PRO 6.0::19990601::extensions to HTML 4.0//EN">; it's frames based designs, table based layouts, blink tags and under construction gifs.
Web 2.0 is the transition from homepages and webmasters to content and platforms, users are producing the content and platform owners get rich off ads. It also coincides with the shift to AJAX and web applications that had logic in the front-end, but this isn't really part of the actual definition.
Web 3.0 was briefly the semantic web. It didn't really take off and was largely forgotten when the cryptobros relaunched the term. New Web 3 is all about using decentralization, blockchains and cryptocurrencies and NFTs to somehow solve the problems with Web 2.0.
Web 2.0 is the transition from homepages and webmasters to content and platforms, users are producing the content and platform owners get rich off ads. It also coincides with the shift to AJAX and web applications that had logic in the front-end, but this isn't really part of the actual definition.
Web 3.0 was briefly the semantic web. It didn't really take off and was largely forgotten when the cryptobros relaunched the term. New Web 3 is all about using decentralization, blockchains and cryptocurrencies and NFTs to somehow solve the problems with Web 2.0.