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Audience attributes can be used to display an effect only to a specific group of players, rather than the entire server, by using the audience=<audience type> attribute in a mechanic that supports audiences and specifying an audience type to use. This can be useful in preventing too many particles from being displayed to everyone unnecessarily, and can reduce client-side lag to some extent.

The audience types are:

• self/caster: the caster of the mechanic
• nonSelfWorld/nonSelf: every player in the world other than the caster of the mechanic
• target: the target of the mechanic
• world: every player in the world
• tracked/trackedplayers/: every player whose client can render the caster
• nearby/nearbyplayers: every nearby player (closer than 65536 blocks)
• @Targeter: every player that the targeter targets

The default value is tracked

Of particular relevance is the audience=@Targeter attribute, that allows any entity targeter to be used as the audience of the effect

    Skills:
    - effect:particles{particle=reddust;y=2;audience=@Owner} @self