# Session data and player data

> Learn how session and player data are structured and used in Unity Multiplayer Services

Sessions support two types of custom data:

* Session-scoped data is associated with the entire session and can include fields that are indexed for querying.
* Player-scoped data is associated with a specific player in a specific lobby. Each player in the lobby can have different set properties.

## Limits

Session data

* **Maximum properties**: 20
* **Non-indexed**: 2 KB / each
* **Indexed**: 128 B / each
* **Maximum number of indexed strings**: 5
* **Maximum number of indexed numbers**: 5

Player data

* **Maximum properties**: 10/player
* **Maximum size**: 2KB
* Not indexable

## Data access and visibility

There are three levels of access to data:

### Public data

* Data that is visible to anyone, including players who are not in the session.
* Examples of public data include maps and profile icons.

### Member data

* Data that is only visible to players who have joined the session.

### Private data

* Data that is only visible to an individual player who is in the session.
* Session data that is only visible to the host, player data that is only visible to the owning player and the host.

### Data access table

Depending on a player's role in the session (host, member, or non-member), they have different access restrictions to data:

| Role of Player | Write session data | Read session data       | Write player data for their player | Write player data for other players | Read player data with the following visibility |
| -------------- | ------------------ | ----------------------- | ---------------------------------- | ----------------------------------- | ---------------------------------------------- |
| Session Host   | Yes                | Yes:PublicMemberPrivate | Yes                                | No                                  | Yes:PublicMember                               |
| Session Member | No                 | Yes:PublicMember        | Yes                                | No                                  | Yes:PublicMember                               |
| Non-member     | No                 | Yes:Public              | No                                 | No                                  | YesPublic                                      |

> **Note:**
>
> Only the host can modify session data. In addition, a player’s data can only be modified by the player themselves.