The WhatsApp Business App is the entry-level product for solo sellers and small teams. It looks and feels like the regular WhatsApp app but adds a business profile, labels for organizing chats, and a product catalog.
It runs on a single phone number and is operated manually by a person tapping on a screen. That makes it a good fit for low volumes but a poor fit for automation, broadcasts to large lists, or connecting other software.
Businesses that outgrow the app typically migrate to the WhatsApp Business Platform and its API, which support multiple agents, automation, and campaigns at scale.