The channel is mainly responsible for contacting the agency, and the direct customer is mainly responsible for contacting and communicating with customers.

Direct customer sales are end users. The channel is that you give your advertisement to the agent, and then the agent communicates with the customer.

Advertising, as its name implies, is to advertise widely, that is, to inform the general public of something. As far as its meaning is concerned, advertising can be divided into broad sense and narrow sense.

Broadly speaking, advertisements refer to advertisements that are not for profit, such as government announcements, notices and statements of political parties, religions, education, culture, municipalities and social groups.

In a narrow sense, advertising refers to advertising for profit, usually referring to commercial advertising or economic advertising. It is a means for industrial and commercial enterprises to spread commodity or service information to consumers or users in a paid way through advertising media.

Commercial advertisements are such economic advertisements.