You’ve got big problems if the online ad you buy is served up by a big site like DoubleClick

Source: eMarketer

How do you tell if an ad is served up by a big service like DoubleClick?

Related information:

• Online advertisers beware: Millennials & Other wine drinkers more likely to use ad blockers

• Online ad server companies like Doubleclick plagued by “bad actors” — malware, scammers, fraudsters

• This is how malware can get into ads served up by Google/DoubleClick and other big networks (And why adblockers keep them from being seen)