Advertising refers to the practice of promoting a service or a product through a public communication medium.

Arguments in favor of Arguments opposing
It is a practice of promoting a service or a product.
Advertising helps businesses to make their products and services known to the public. Businesses may use advertising to promote deficient products or unsatisfactory services. 
It takes place through a public communication channel.
Advertising can educate the public on the availability of potential choices for various products and services. Advertising may influence the public behavior to acquire unneccessary products or services, potentially causing lost productivity.

Competing Views...

Jeff Bezos: "I’m skeptical of any mission that has advertisers at its centerpiece.", Interview with Washington Post, September 3, 2013, [URL]

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