> ## Documentation Index
> Fetch the complete documentation index at: https://learn.social.plus/llms.txt
> Use this file to discover all available pages before exploring further.

# Discovery & Engagement Overview

> SDK surfaces for feeds, search, notification tray, and discovery-driven engagement.

Discovery and engagement APIs help users find content, communities, and activity updates. Use this overview to choose between feed retrieval, intelligent search, and notification tray APIs.

<CardGroup cols={2}>
  <Card title="Feeds" href="./feed/overview" icon="rss">
    Query global feeds, custom-ranking feeds, and community or user feeds.
  </Card>

  <Card title="Intelligent Search" href="./search/overview" icon="search">
    Search posts and communities through SDK-supported semantic search surfaces.
  </Card>

  <Card title="Notification Tray" href="./notifications/overview" icon="bell">
    Retrieve tray items, item status, tray seen status, and notification event metadata.
  </Card>

  <Card title="Reactions & Mentions" href="../../core-concepts/content-handling/reactions" icon="heart">
    Add engagement affordances on posts, comments, stories, and other supported content.
  </Card>
</CardGroup>

## Choose The Right Surface

| Goal                                     | Use                                                                   |
| ---------------------------------------- | --------------------------------------------------------------------- |
| Build a scrollable discovery feed        | [Feed Overview](./feed/overview)                                      |
| Search communities by meaning or keyword | [Intelligent Search Community](./search/intelligent-search-community) |
| Search posts or hashtags                 | [Intelligent Search Post](./search/intelligent-search-post)           |
| Show notifications in-app                | [Notification Items](./notifications/notification-items)              |
| Track tray seen/unseen state             | [Notification Tray Status](./notifications/notification-tray-status)  |

<Info>
  Platform coverage varies by surface. Each linked page includes the platform-specific SDK availability and code examples for that feature.
</Info>

## Related Topics

<CardGroup cols={2}>
  <Card title="Feed Overview" href="./feed/overview" icon="rss">
    Query feed content for discovery surfaces.
  </Card>

  <Card title="Search Overview" href="./search/overview" icon="search">
    Compare post and community search options.
  </Card>

  <Card title="Notification Overview" href="./notifications/overview" icon="bell">
    Build notification tray experiences.
  </Card>

  <Card title="Content Sharing" href="../content-management/content-sharing" icon="share">
    Share content into feeds and engagement flows.
  </Card>
</CardGroup>