MetaMask is a non-custodial cryptocurrency and token wallet. It gives you complete control of your keys and therefore your assets. A non-custodial wallet eliminates the third party between you and your crypto, which is more suitable for some people.
MetaMask doesn't store any data about the wallet. Everything you see is in your browser or your mobile app. There are no email addresses associated with accounts. There is only a Secret Recovery Phrase that is given once and cannot be reset. Also, there are private keys that cannot be shared for any imported accounts. Please keep your Seed Phrase / Secret Recovery Phrase and Private Keys offline and back them up.
We cannot access your wallet from our side. You are the only person who can access it directly from the Extension or Mobile app.
To better communicate the importance of never sharing your seed phrase, we've changed the name of the phrase to "secret recovery phrase". Learn more here