You must first log in to the Binance website to use Google Authenticator. Tap on the security button and select the Google Authenticator option. Next , install the Google Authenticator application on your phone. Make sure your phone's time is synchronized with your computer. If you're using an Apple or Android mobile device , make sure the date and time setting is automatically set. The process will take about 15 minutes. During this time , make sure you don't refresh your browser while processing your information.