More than 65% of mobile users aged 18-45 prefer text communication. WhatsApp Business API is the #1 messenger communication tool in Russia for medium and large businesses with the possibility of feedback. The service increases the efficiency of enterprises with a large number of customer requests and transaction notifications. Therefore WhatsApp Business API is beneficial for banking, hospitality, restaurant business, retail, and e-commerce. Sending notifications using WhatsApp allows you to build a base of subscribers, increase engagement, increase conversions, and extend the customer lifecycle. The API allows direct access to the WhatsApp IT infrastructure, allowing companies to automate communication with customers using the official WhatsApp channel entirely.