Advertising revenue is money that governments (usually municipalities) earn by selling advertising space on public property such as buses, transit shelters, park benches, arena boards, and digital displays. This represents a form of 'non-tax revenue' that helps fund services without raising property taxes. A large transit system might generate millions of dollars annually from selling bus and shelter advertising. However, municipalities must balance revenue potential against concerns about advertising clutter, the types of ads permitted (many ban tobacco, alcohol, or political advertising), and community aesthetics. Advertising contracts are typically awarded through competitive bidding processes.