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  In 1450, Gutenberg created the printed media, it allows the mass diffusion, in a future this event would be the beginnig of current marketing.
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  This brings a new mean of diffusion in american population, a new opportunity to American companies.
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  A half of American population own a radio, this is an amazing rise because twenty years before the whole population didn´t get anyone.
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  The first Tv spot was created and it attains 4000 tv devices.
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  Above 50% of American population has access to telephonic communication.
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  In 1954 tv advertising has become in a bigger revenue than radio and newspaper publicity
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  Telemarketing arises as an efficient and profitable advertising resource.
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  In 1981 the Maccintosh was advertised inside half-time super Bowl.
This advertisement reached 44.6% of American families in the United States - 
  
  Between 1990 and 1994, 2g connection was tasted in the United States, it means the beggining of the new digital media
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  The TV gains more revenue than newspapers and magazines by advertising.
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  Yahoo lauchs its search engine
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  The word SEO is added inside marketing language
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  Google launched its search engine, in the next years it will launch other amazing programmes such as Adwords and Google analytics.
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  In 2004 Facebook was created by Mark Zuckenberg, at the same time linkedin was launched.
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  Youtube was launched as a new platform and proves new type of content by young population.
In 2017 youtube creates its paying service called "YoutubeRed" - 
  
  Amazon becomes in a millionaire company, inside that period the digital store sold 10,000 million of dollars approximately.
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  Young population around the world spend .1 hours more in internet than tv, this is the new trending around the world, it is expected that this fact will increase.
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  The internet neutrallity finished in 2017, this date will bring important and (probably) negative changes in digital bussiness, advertising revenues and publicity inversion.
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  In 2016 Google changes its algorithm and facebook changes the game talking about paid advertising.