Web3 refers to the next generation of the internet, also known as the decentralized web or the blockchain web. It is built on blockchain technology and enables decentralized applications (DApps) and smart contracts to be run on a peer-to-peer network without the need for intermediaries.

Cryptocurrency is a digital or virtual currency that uses cryptography for security. It operates independently of a central bank and is decentralized, meaning that it is not controlled by any government or financial institution. Cryptocurrency transactions are recorded on a public digital ledger called a blockchain. Bitcoin is the first and most widely known cryptocurrency, but there are now thousands of different cryptocurrencies in circulation.

A blockchain is a decentralized, digital ledger that records transactions across a network of computers. Each block in the chain contains a number of transactions and a reference to the previous block. This creates a chain of blocks, hence the name blockchain. The network is designed to be transparent, secure, and tamper-proof, making it an ideal technology for applications such as cryptocurrencies, smart contracts, and supply chain management.

There are a few ways to get your hands on crypto. You can use a platform like Binance or Coinbase to buy it with real money or other crypto. Or you can buy it from someone you know through a peer-to-peer marketplace. Once you have your crypto, you'll need to store it in a digital wallet. There are different types of wallets, like software wallets, hardware wallets, and paper wallets. Just pick the one that works best for you.

A smart contract is like a computer program that runs on the blockchain and automatically executes the terms of the contract. No need for a middleman. Smart contracts are transparent, tamper-proof, and can be used for all sorts of things like financial transactions, supply chain management and even voting.

DApp stands for decentralized application. It's an app that runs on the blockchain and isn't controlled by any one entity. DApps use smart contracts to run automatically. They can be used for all sorts of things like social media, gaming, and finance.

A public blockchain is like a huge open network that anyone can join, like Bitcoin or Ethereum. A private blockchain is more like a closed network that only certain people can join, like Hyperledger or Corda. Public blockchains are fully decentralized, and private blockchains are more centralized, where access and decision making is restricted.