MetaMask includes a non-custodial cryptocurrency and token wallet. It gives you complete control of your access keys and therefore your assets. A non-custodial wallet eliminates the third party between you and your cryptoassets, 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 at a local level. There are no email addresses associated with accounts. There is only a Secret Recovery Phrase that is given once and cannot be changed or reset. Also, there are private keys for imported accounts that must not be shared. Please store your Secret Recovery Phrase and Private Keys offline and back them up.
For more detail on this topic, see our blog post here.
We cannot access your wallet from our side. You are the only person who can access it directly from the Extension or Mobile app.
Learn more about your Secret Recovery Phrase and how to keep your account safe here.