1: What is MetaMask?

MetaMask is an open-source cryptocurrency wallet that primarily exists as a browser extension and mobile app. It is used to manage digital assets, connect to decentralized applications (dApps), and interact with Ethereum and other compatible blockchains.

It is incubated by its parent company Consensys!

Launched in 2016, it is one of the most popular self-custodial wallets in the Web3 ecosystem.

As of 2025, MetaMask has over 20 million monthly active users (MAU), supporting features such as DeFi, NFTs, cross-chain bridging, and allowing developers to extend functionality through the Snaps system.

2: Features

1. Ease of Use and Multi-Platform Support

MetaMask is easy to install—just like adding a browser plugin—and supports mainstream browsers such as Chrome, Firefox, Brave, and Edge, as well as iOS and Android mobile apps.

The user interface is intuitive, allowing even beginners to easily send/receive tokens and check balances.

Built-in guided tutorials help users quickly get started with Web3 concepts.

2. Asset Storage and Multi-Chain Compatibility

Supports storing ETH, ERC-20 tokens (such as USDT, UNI), and ERC-721 NFTs (non-fungible tokens).

Compatible with multiple blockchain networks, including Ethereum mainnet, Layer 2 solutions (such as Optimism, zkSync), and Solana, totaling over 10 chains, with easy switching between them.

3. DApp Integration and Web3 Access

Seamlessly connects to decentralized applications (dApps), such as Uniswap (DEX trading) and OpenSea (NFT marketplace), handling signature and transaction requests via JavaScript interfaces.

Built-in “Discover” tab recommends popular dApps and NFT trends, allowing direct exploration and interaction within the wallet.

4. Built-in Swaps and Trading Functions

MetaMask Swaps: Aggregates multiple DEXs (such as Uniswap, 1inch) to provide the best exchange rates for token swaps, supporting cross-chain operations with a success rate of up to 99.995%.

Gas Station: Optimizes Gas fees (transaction fees), allows payment with non-ETH tokens, and supports custom Gas pricing.

5. Security Mechanisms

Private keys and seed phrases (Secret Recovery Phrase) are encrypted and stored locally, with full user control; includes built-in anti-phishing protection (Blockaid) and malicious site warnings.

Supports hardware wallet integration, such as Ledger and Trezor, providing cold storage options to further isolate online risks.