A digital record book shared by many computers. Every transaction is saved in a "block" and linked together, making it very hard to change.

An app or device that lets you send, receive, and store crypto. It holds your secret keys to control your assets.

An app that runs on a blockchain network, not on a single company’s server. This means no single entity can control or shut it down.

A unique digital item that represents ownership of things like art, music, or game items. Its uniqueness is verified on the blockchain.

A program on the blockchain that runs automatically when certain conditions are met. It allows people to make agreements without a middleman.

A fee you pay to use a blockchain network, like Ethereum. It compensates the people (miners/validators) who process and secure your transaction.

Putting your website on many computers (like IPFS) instead of one central server. This makes your site censorship-resistant and always available.

A type of crypto designed to maintain a stable value, usually by being backed by real-world assets like the US dollar. Examples: USDT, USDC.

A way to earn more crypto by lending or staking your coins in DeFi applications. You receive rewards ("yield") for providing liquidity.

A collection of tokens locked in a smart contract. These pools are used for decentralized trading, and users who provide tokens earn a share of the fees.

A group or organization that operates on the blockchain based on smart contracts. Decisions are made by members voting, not by a central leader.

A technology built on top of a primary blockchain (Layer 1) to make transactions faster and cheaper. Examples include Arbitrum and Polygon for Ethereum.

The economics of a crypto token, including its creation, supply, distribution, and the mechanisms that give it value.

A free distribution of crypto tokens to a large number of wallet addresses, often to promote a new project or reward early users.

A scam where the developers of a crypto project abandon it and run away with investors' funds, leaving them with worthless tokens.

The process of locking up your crypto assets to help secure a blockchain network. In return, you earn staking rewards, similar to earning interest.

A crypto wallet that is not connected to the internet, such as a USB hardware device. It is considered much safer from online hacking attempts.

A crypto wallet that is connected to the internet, like a browser extension (MetaMask) or a mobile app. It offers convenience but is less secure than a cold wallet.

A crypto exchange that operates on smart contracts without a central authority. Users trade directly from their own wallets. Example: Uniswap.

A crypto exchange managed by a single company, like Binance or Coinbase. Users must create an account and trust the company to hold their funds.

A secret code that proves ownership and gives you access to your crypto. You must never share your private key with anyone.

A list of 12 or 24 words that acts as a master backup for your wallet. It can be used to recover your funds if you lose your device.