WhatsApp is an international messaging and calling tool that caters to people in over 180 countries. It is available for free on mobile devices around the world, offering secure, reliable communication services that include both individual and group conversations. Users can communicate privately with end-to-end encryption, ensuring security and privacy. Apart from basic text messaging, WhatsApp allows users to express themselves through stickers, GIFs, and voice messages. The application also supports end-to-end encrypted video and voice calls, which makes it a popular choice for staying connected with friends and family. Additionally, it offers a business version, known as 'WhatsApp Business', that helps companies reach their customers more easily. This version provides additional features designed for small and medium businesses, such as automated responses and the ability to showcase products and services. WhatsApp is compatible with various technological platforms, including Android, iPhone, and desktop. Additional supporting features include the ability to send photos, videos, documents, and locations. User assistance is provided through a dedicated Help Center.