A broadcast medium having large number of channels to choose from, enabling companies to more effectively address the target audience demographics. It reaches a large number of consumers.
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It is a higher-cost medium, forcing the advertiser to choose the best possible run times to capture the highest target audience for the product. The return on investment is still very low.
Radio
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Advertisers can purchase slots connected to specific events, to reach specific target audience.
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More popular stations charge premium rates to get the message across to a larger audience. While listeners are a captive audience, typically listening in their cars, at work or at home, it is difficult for them to respond to a radio ad.
Print
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Print ads allow advertisers to target audiences more effectively than broadcast media, because of repetitive view. Also allows more information to be conveyed.
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Physical limitations. Unless a potential customer picks up the magazine or newspaper and glance through the pages, the ad is missed. In order for the campaign to be effective, continuous & expensive promotion is required.
SEM
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As a narrow-cast medium, SEO services target those who are already seeking information about products or services in a selected industry. Return on investment is exceptionally high, as visitors to the company's Web Site become regular customers. To sum-up, SEO enables companies to increase their site traffic, sales and brand image, at the cost of only an ancillary component.
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Business assurance will depend on content, presentation and technical quality of the website.