In order to connect your Zignaly account with your Binance account you need to create API keys:
Open your Binance account and go to API settings.
Set a name for your Keys (Ex: Zignaly), and click on "Create New Key".
An email will be sent to you. Just open it and confirm.
Once confirmed, you'll see the new API keys.
Save them in a safe place because once you leave the Binance website, the secret key won't be shown anymore.
Just for reference, this is the official guide to API creation from Binance.