Used to store cross-resource accessible information. This functionality stores an object on a player that can than be accessed with getMeta
This type of meta is only accessible where it is created.
If it is created on the client-side it is only accessible on the client-side.
If it's created on the server-side it is only accessible on the server-side.
setMeta(key: string, value: any): void;
You can store literally anything. Except functions.
Real World Example
player.setMeta('myData', 'hello from meta');
alt.Player.local can also be a player instance from server