Marketers hope for a true marketing system. They want to tie all the pieces of their marketing plan together, from advertisements to points of sale to after-sale customer service. To do this successfully, marketers should consider ways to track their advertisements, so that they can see whether the advertisements are successful, and how many sales the advertisement generated. This is not easy to do, especially in television advertising.

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8 Steps To Creating An Effective Marketing Information System – Business Insider