The electoral structure defines the formal accountability link between an official and your neighborhood.
In a District/Ward system, you have one council member specifically elected by your neighborhood. Their political success depends on addressing your area's concerns, making them your direct advocate for hyper-local issues like potholes, park maintenance, or specific zoning changes.
In an At-Large system, every council member is elected by the entire city. While this encourages a city-wide perspective, your neighborhood must compete for attention against all others. For local issues, you may need to build a coalition or convince multiple members that your concern is a city-wide priority.
Knowing which system your city uses tells you who to hold accountable and how to frame your advocacy.