A mobile wallet is a way to carry your Cryptocurrencies in a digital form on your mobile device. To set up your first Bitcoin wallet go to Blockchain.info and complete the sign up process. Enter your email, a strong password (write it down; keep it safe), and fill in the captcha. Once you've done this, login to your wallet. Beside the QR code there is a long bold string of characters, that looks similar to this 1P2dSUUP5mHr3tboPY3wgXujXvqhzfzmpN This is your public wallet address that you can give to people when you want them to send you Bitcoin, Ethereum or Litecoin. Alternatively, you can have people scan your QR code to send you coins.