As advertisers invest more dollars in Web video, many brands and agencies are increasingly eager to know if their ads ran where they were supposed to. 

As a result, the business of online ad verification is quickly growing.

This week's New Media Minute looks at how agencies like Hill Holiday and GroupM are turning to verification technology from companies such as Double Verify and Ad Safe. Online video ad networks like Brightroll and Tremor Media are also proponents of reporting and verification.  Here's how it works and why it matters.

Daisy Whitney

Editor's Note:  Daisy's New Media Minute is produced and sponsored separately from Beet.TV.   We are pleased to publish this show weekly.  AP