The purpose of commercial is to advertise or promote or let people know about certain product or service. A strong commercial will attract people to adapt or buy their product or service.
In this MaLeiSia, everywhere and anytime you can see commercials. Commercials that appear on TV, means they are from BIG companies. Commercials from
sign post, tree, wall, lamp post, fire host, or even rubbish bin, and so on so forth, are those from small (also some big) companies.