#قسيمة Brown vouchers on the Binance app are a type of promotion offered by the platform to encourage users to trade cryptocurrencies. These vouchers give users discounts on trading fees or rewards when executing certain trades. They can be used to reduce trading costs or increase profits. They are sometimes distributed as part of special events or challenges, and can be redeemed directly in the app. They are a way to enhance the user experience and attract more traders to the platform.