Maybe Tremor Media Video Network isn’t a household name in the style of YouTube or Hulu, but this is a name marketers should get to know. According to the latest data from comScore, Tremor Media Video, a video ad network, was the top video property in June in terms of reaching the U.S. population.

The results of comScore’s latest Video Metrix reveal that Tremor delivered ads to 21.4 percent of the U.S. population, meaning it was responsible for reaching nearly half of the 46.1 percent of Americans who watched video ads in June. Google sites came in second, reaching 15.4 percent of the U.S. population last month.

Even while ads on Tremor reached the most viewers, the site only accounted for 524 million ad views of the 4.3 billion video ad views last month. Hulu beat out Tremor, with 566 million ad views on its site. Nonetheless, Hulu’s ads reached just 7.8 percent of the U.S. population. Thus, marketers may reach a broader scope of Americans by advertising on Tremor, but they may get more frequent views on Hulu.

No matter which platform they choose to advertise on, it is becoming increasingly clear that online video ads are an effective way for businesses to reach consumers. A recent report from Magid Media indicates that more than half of Americans who watch online video content are open to advertisements on the channel.