Values
Values are created to store custom data inside of the game tree. Values only store data in the game session, they are not for storing permanent data, which is what the Datastore global is for.
You can store values such as a player's team, their points inside of a round. You can also store game objects which is stored using a InstanceValue.
Example
Store a player's team inside of the player class.
local teamData = Instance.New("StringValue")
teamData.Value = "BlueTeam"
teamData.Parent = game["Players"]["fase"]