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Ads provide information. An event you might be interested in is happening. A food you might like is available. A thing that will totally improve your life can be yours. etc

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The information in most ads is things like: "Skinny beautiful people are worthy of love and use this brand of makeup". Or "good parents who love their children go to Disney World". Or "it's a rugged and cool type of person that buys a Jeep".

The type of ads that do what you're taking about are sought out. People willingly watch Nintendo Directs.

If that is all they were they wouldn't be a problem but this is obviously an over simplification.

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