(1) Paying for clicks you would have had anyway. Many people know precisely which site they're looking for in advance. Googling the site and then clicking that paid AdWords link is simply our lazy way of getting where we were already going. And there are cheaper ways of providing visitors with short cuts.

(2) Paying for non-customer traffic. I don't mean non-converting traffic. Rather, I'm talking about people who visit your site simply in order to promote their own service. You'll be paying for the privilege of hearing more sales pitches. After all, these people find you the same way as prospective consumers.

(3) Providing Google with data about your traffic enables Google to know more about your traffic than you do. Recently Google has begun withholding more and more information. One way or another, that data will be sold back to the same customers who provided Google with the data.

(4) Renting space often leads only to further dependence on rented traffic. The same money can be spent on other services and assets that improve content and visibility or expand one's online footprint in terms of actual holdings.

The answer to that is simple: realistically, you have little or no control over which sites those ads appear on, despite what Google and others tell you. Because of that, you have a very great risk of wasting your money due to "click spam" where the site owners for those display network sites nefariously generate bogus clicks, to earn part of the pay-per-click fee that Google charges. It's a waste of money.

Lack of trust. The bulk of paid ad works are haughtily sold by over eager sales reps, and they don't provide any robust value.

Ad networks hold wide appeal for both publishers and advertisers. On the content provider side, they offer an easy way to sell a large amount of inventory—even if the revenue per impression is typically less than with direct sales. On the advertiser side, according to a worldwide study by Econsultancy and the Rubicon Project, the main benefits of using ad networks are increased reach, flexible payment models and lower costs.
There are also challenges, however, associated with giving up full control over ad placements. Nearly two-thirds of respondents (65%) said they worried about their ads appearing next to inappropriate content. Almost as many (62%) complained of discrepancies between their own data and that from networks. Still, the benefits of reach, flexibility, cost, and targeting cannot be ignored. Respondents told Econsultancy that 30.61% of their display ad budgets were spent via ad networks, and 31.91% of media plans included networks. What is more, about one-half of marketers said they were working with a greater number of ad networks than a year ago, with 37% holding steady. And many expected to be working with ad networks even more next year. Relatively few had cut back on work with ad networks, or planned decreases for the future. Savvy advertisers will keep in mind the trade-offs associated with network buys.
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath