## Template CategoriesThe WhatsApp Business API supports several message categories, each designed for specific business communication needs. The main categories relevant to your query are marketing, utility, and authentication.### 1. Marketing TemplatesMarketing templates are used to promote products, services, campaigns, and customer engagement activities. These templates help businesses reach customers with offers, announcements, and promotional content.#### CustomCustom marketing templates allow businesses to send personalized promotional messages using text, media, variables, and CTA buttons. These are commonly used for discounts, campaigns, and customer outreach.#### CarouselCarousel templates display multiple products or offers in a single swipeable message. Each card can contain its own image, description, and action button for a more interactive experience.#### FlowsFlow templates help businesses create guided customer journeys directly inside WhatsApp. They are useful for lead collection, appointment booking, surveys, and interactive forms.#### CataloguesCatalogue templates allow businesses to share products directly from their WhatsApp catalogue. Customers can browse products and explore offerings without leaving the chat.### 2. Utility TemplatesUtility templates are used for transactional and service-related communication. These messages are typically sent after a customer action, purchase, or service request.#### CustomCustom utility templates are commonly used for order confirmations, payment reminders, shipping updates, and appointment notifications. They provide important information related to customer activity.#### FlowsFlow utility templates combine updates with interactive actions inside WhatsApp. Customers can complete tasks like rescheduling appointments, submitting feedback, or confirming requests directly from the chat.### 3. Authentication TemplatesAuthentication templates are designed for secure user verification and login processes. These templates are strictly used for authentication-related communication.#### OTPOTP templates are used to send one-time passwords for account verification and secure login. These messages are time-sensitive and follow WhatsApp authentication guidelines. Category Purpose Marketing Promotions and customer engagement Utility Transactional updates and notifications Authentication OTP and account verification