What is the role of advertising agencies in information dessimination?

# ad agency helps in the Production of Consumer Culture # it helps in promoting an ideology of marketed consumption # it also build marketing communications demand creation # to produce an ad that meets the clients demands # it appeal to a mass audience # agency also compliances service # in 21st century agency helps in planning, preparing and placing a campaign # helps in creating a compititive situation # it also measures the marketing mix and advertising research concept of an ad