MyEtherWallet (MEW) is a free, open-source, client-side interface for creating and managing Ethereum wallets. It allows users to generate Ethereum wallets and store their Ether (ETH) and other Ethereum-based tokens securely.

MEW operates entirely on the user's device, meaning that private keys and other sensitive information never leave the user's computer or browser.

Here are some key features and aspects of MyEtherWallet:

1. Wallet Creation: Users can create new Ethereum wallets easily through the MEW interface. It provides users with a keystore file, a mnemonic phrase, and a private key for wallet access.

2. Access Control: MEW allows users to control access to their wallets using various methods, such as private keys, keystore files, and mnemonic phrases. It's crucial to keep these credentials secure, as they are the means to access and manage the associated funds.

3. Token Support: MyEtherWallet supports a wide range of Ethereum-based tokens (ERC-20 tokens), allowing users to manage not only Ether but also various other tokens built on the Ethereum blockchain.

4. Interfacing with Hardware Wallets: MEW supports integration with hardware wallets like Ledger and Trezor, providing an extra layer of security by storing private keys offline.