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

# Collections

> Organize notes without folders. Add notes to one or more collections for flexible structure and powerful search.

## Overview

Collections let you group related notes together—similar to tags, but with more structure. A note can live in multiple collections at once.

## How to add a note to a collection

* Click **Organize** in an open note and type a collection name. Select an existing collection or create a new one.
* Or type `#` followed by the collection name while editing. Pick from suggestions or create a new collection.

## Auto‑Organize

* Click **Organize** and choose **Auto‑organize** from the menu.
* Mem will try to add the note to an existing collection, or create a new one if it doesn’t find a good fit.
* You can also multi‑select notes and choose **Auto‑organize** to file many notes at once. See: [/features/bulk-actions](/features/bulk-actions)

## Shared Collections

Collaborate with your team by sharing a Collection. Everyone you share with sees the same set of notes and updates in real time.

How to create a Shared Collection:

* Open an existing Collection (or create a new one).
* Click the Share icon at the top right of the Collection page.
* Add teammates by name or email. If someone doesn’t have a Mem account yet, they’ll receive an invite and can register to join.
* When you add a note to this Shared Collection, that note is shared with all members automatically.

Why use Shared Collections:

* Keep project docs, meeting notes, and decisions in one place.
* Share many notes at once by adding them to the Collection.
* A note can live in multiple Collections, so it can belong to several shared spaces at the same time.

## Why collections matter

* Use collections for filtering and search
* Guide Chat by attaching one or more collections to your prompt
* Notes in the same collection are surfaced together in **Heads Up** while you work

## Related

* Learn more: [Pinning notes and collections](/features/pinning)
* Explore side-by-side work: [Tabs & Split Screen](/features/tabs-and-split-screen)
* Bulk actions: [/features/bulk-actions](/features/bulk-actions)
* Chat: [/features/chat](/features/chat)
* Heads Up: [/features/heads-up](/features/heads-up)
* Search: [/features/search](/features/search)