> For the complete documentation index, see [llms.txt](https://docs.quickreply.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts.md).

# Concepts

- [WhatsApp Business Account Profile](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/whatsapp-profile.md)
- [WhatsApp Official Business Account (OBA) / WhatsApp Blue Tick](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/whatsapp-profile/official-business-accounts.md)
- [Messages](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/messages.md)
- [Types of messages](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/messages/types.md)
- [Messaging limits & quality rating](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/messages/limits-and-quality.md)
- [Supported Media Types](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/messages/supported-media-types.md)
- [Marketing Message Lite (MM Lite API)](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/mm-lite.md)
- [Get a Free Number from Meta](https://docs.quickreply.ai/overview/messaging-channels/whatsapp/concepts/meta-free-number.md)