You need to have Metamask installed and set up or a mobile wallet supported by WalletConnect, as well as ADX tokens and some ETH for gas in your Metamask account or wallet. If you keep your tokens on a hardware wallet, you can easily connect it to Metamask.
You do not need to be online or have your wallet connected at all times to earn rewards. You will be earning rewards regardless if you are online for as long as you have an active stake.
Important: Please note you do NOT need an AdEx platform account in order to stake.