The Secret Recovery Phrase is a string of words that is generated when you first set up Espresso Cash. This phrase gives you access to your wallet. Once you create your wallet, you will receive this unique set of words. You should write them down and store them in a safe place, so that you can use them again if you need to restore your wallet in another device. You should not share your secret recovery phrase with anyone, because whoever has this information can access your wallet and your funds.