All or specific locations
Every rule has an Apply to setting. Choose All locations to run it everywhere, or Specific locations to pick the exact sites.
When to scope
Scope a rule when it only makes sense in some places. A tide panel belongs at your coastal sites, not your high-street unit. A sunny-day banner belongs where you actually have a banner and outdoor space.
Change it later
Open the rule from Operations > Automations, change the locations, and save. The new scope applies from then on.