Buzzwords? Are you experiencing FOMO?
The semantic Web (a.k.a. Web 3.0, Web 3, or simply web3) is tied to blockchain technologies.
Most of us think cryptocurrencies every time we hear/read the word blockchain, but although such tokens are intrinsic and use blockchain infrastructure, the latter is not just for decentralized finance (DeFi), or the newest investing craze called Non-Fungible Tokens (NFTs), but also for newer technologies that allow everybody to trade, contract, and deploy systems that are independent of Big Tek companies.
There are many detractors of such new concepts, but there are others that have invested all their resources (monetary and otherwise) in it.
Although the fundamentals are difficult to understand by simply reading about them, a face-to-face explanation always clarifies such complex concepts.