> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-22654f5b-docs-agent-in-group-react-v6.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Extensions

> Extensions — CometChat documentation.

We believe that building a great chat product does not consist of just voice, video and text chat. It's much more than that. And Extensions are our answer to this.

Extensions pickup where our core leaves. They help extend the functionality of CometChat.

### Notifications

Extensions that help alert users of new messages. *Recommended for all apps.*

[Push Notification](/notifications/android-push-notifications)\
[Email Notification](/notifications/email-notifications-extension-legacy)\
[SMS Notification](/notifications/sms-notifications-extension-legacy)

### User Experience

Extensions that help improve the user messaging experience. *Recommended for most apps.*

[Thumbnail Generation](/fundamentals/thumbnail-generation)\
[Link Preview](/fundamentals/link-preview)\
[Rich Media Preview](/fundamentals/rich-media-preview)\
[Voice Transcription](/fundamentals/voice-transcription)\
[Pin message](/fundamentals/pin-message)\
[Save message](/fundamentals/save-message)

### User Engagement

Extensions that help increase user engagement. *Recommended for advanced apps.*

[Smart Reply](/fundamentals/smart-replies)\
[Message Translation](/fundamentals/message-translation)\
[Emojis](/fundamentals/emojis)\
[Polls](/fundamentals/polls)\
[Reactions](/fundamentals/reactions)\
[Stickers](/fundamentals/stickers)\
[Video Broadcasting](/fundamentals/video-broadcasting)\
[Collaborative Whiteboard](/fundamentals/collaborative-whiteboard)\
[Collaborative Document](/fundamentals/collaborative-document)\
[Mentions](/fundamentals/mentions)\
[Giphy](/fundamentals/giphy)\
[Tenor](/fundamentals/tenor)\
[Gfycat (Deprecated)](/fundamentals/gfycat)

### Moderation

*Extensions that help you to build a safe messaging environment.* *Recommended for live streaming and event apps.*

[Legacy Moderation Extensions](/moderation/legacy-extensions)