> 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/instagram-and-messenger/concepts.md). # Concepts ## Messaging Window & Response Time Similar to WhatsApp, Meta enforces a **24-hour messaging window** for businesses to respond to customer-initiated messages. After 24 hours, the window closes and you can no longer initiate messages to the customer. *** ## Automation & Quick Replies Businesses can set up **automated responses** for frequently asked questions and use **quick replies** to improve response efficiency. *** ## Message Types & Media Support Instagram and Facebook support various message formats, including: * Text messages * Images & videos * Carousel posts * Quick reply buttons * Story mentions & responses *** ## Instagram Story Interactions Customers can initiate conversations by responding to Instagram Stories, providing a great way for businesses to engage with their audience. *** ## Pricing & Limits Unlike WhatsApp, Instagram, and Messenger do not have conversation-based pricing, but businesses should adhere to **Meta’s fair usage policies** to avoid limitations on messaging. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.quickreply.ai/overview/messaging-channels/instagram-and-messenger/concepts.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.