> 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.

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## Automation & Quick Replies

Businesses can set up **automated responses** for frequently asked questions and use **quick replies** to improve response efficiency.

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## Message Types & Media Support

Instagram and Facebook support various message formats, including:

* Text messages
* Images & videos
* Carousel posts
* Quick reply buttons
* Story mentions & responses

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## Instagram Story Interactions

Customers can initiate conversations by responding to Instagram Stories, providing a great way for businesses to engage with their audience.

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## 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.