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ion and particularly MTV. Pioneering the concept of the music video, MTV ushered in a new type of advertising: the consumer tunes in for the advertising message, rather than it being a by-product or afterthought. As cable and satellite television became increasingly prevalent, specialty channels emerged, including channels entirely devoted to advertising, such as QVC, Home Shopping Network, and ShopTV Canada.
Marketing through the Internet opened new frontiers for advertisers and contributed to the "dot-com" boom of the 1990s. Entire corporations operated solely on advertising revenue, offering everything from coupons to free Internet access. At the turn of the 21st century, a number of websites including the search engine Google, started a change in online advertising by emphasizing contextually relevant, unobtrusive ads intended to help, rather than inundate, users. This has led to a plethora of similar efforts and an increasing trend of interactive advertising.
Advertisement for a live radio broadcast, sponsored by a milk company and published in the Los Angeles Times on May 6, 1930
The share of advertising spending relative to GDP has changed little across large changes in media. For example, in the US in 1925, the main advertising media were newspapers, magazines, signs on streetcars, and outdoor posters. Advertising spending as a share of GDP was about 2. 9 percent. By 1998, television and radio had become major advertising media. Nonetheless, advertising spending as a share of GDP was slightly lower—about 2. 4 percent. 7
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an increasing trend of interactive and "embedded"