Radio Ads have the following main advantages:
They deliver the messages immediately and with very high frequency even within a single day. It has a captive audience and the one that will share information locally with each other. It also has a low cost of production. Can reach traveling audience too due to transistors, car radios and mobile phones. Radio is one of the media which covers huge population. Radio channels varies from region to region, hence you can listen radio in your regional language. Like other entertainment media. Radio is also favourite of large number of population. Important information or news can be easily spread on radio. For local market radio is one of the powerful medium of communication.