Bus advertising belongs to the so-called OOH section of advertising (out-of-home) which refers to any promotional materials that aim to catch customers outdoors or when they are not at home.In bus advertising, buses and their related infrastructure is a medium commonly used by advertisers to reach the public with their message. Usually, this takes the form of promoting commercial brands, but can also be used for public campaign messages
Transit advertising is advertising placed in or on modes of public transportation or in public transportation areas. Using this method of advertising, ads can be placed anywhere from on the sides of buses, trains and taxis, to inside subway cars, inside bus stations and near train or bus platforms.