What are WhatsApp authentication templates used for?
Authentication templates are used to open an authentication conversation. Authentication templates are commonly used for businesses to perform verification purposes like sending one-time passcodes, and may be used in multiple steps in an authentication process.
Use-cases and structures are well defined for authentication templates and content is restricted to use only WhatsApp's predefined message templates during creation. The predefined templates includes the following:
A mandatory one-time password button (Copy Code or Autofill)
A 15 character limit on parameter
Optional security disclaimer add-ons
Features available in other templates like emojis or URL cannot be included in authentication template.