Google already dominates digital marketing, but the company now has its sites set on television. Google TV Ads, which was in beta for almost a year, went live on Wednesday, according to a post on Google's Inside AdWords blog.

The service works with an auction model similar to the AdWords, with advertisers bidding for placement.  Advertisers choose their maximum cost-per-thousand and only pay when the ads air. Google then sends a report informing the buyer what channel the ad ran on.

Google is also helping marketers create TV spots by connecting them with writers, editors, producers and voice-over talent through its Ad Creation Marketplace. Google also assists by finding relevant programming for the ads.

Earlier this year, Google announced it was working with Panasonic to create TV sets that display internet content.