Last year at the Google Marketing Live event, Google introduced two image driven ad tests. Gallery ads for Search campaigns weren’t giving good results so it will be removed this summer, but Discovery ads finished their testing and are now available to all advertisers globally.

Discovery ads are eligible to serve across the YouTube Home and Watch Next feeds, Discover feed on the Google Search app and in Gmail Promotion and Social tabs and open up new avenues for both Google and advertisers.

If you’ve failed to notice ads in Discover feed yet, that’s because Google is treading very lightly here. Google machine learning is used to determine when to serve a Discovery ad that will deliver the best results on the campaign objective, and the results continue to improve.

When Google introduced the Discovery campaign, it said that the Discover feed has more than 800,000 monthly users. Now, Google is spreading its usage across the YouTube, Discover and Gmail surfaces to claim a combined audience of 2.9 billion people. In comparison to Facebook shared platforms, they reported 2.99 billion monthly active people.

Discovery campaigns aren’t just another effort by Google to move beyond search intent and deliver audience connections throughout the funnel, they give Google an entrance into working with social budgets and teams. Which team is ultimately responsible for Discovery campaigns will vary, but in many cases agencies and companies will have search, display and now social teams with a hand in Google Ads campaigns.

How to set up your Discovery ads? There are two ad formats in Discovery campaigns – Discovery carousel with multiple images and Discovery ads with single image. For the images, Google can scan your website and find the ones with proper dimensions, or you can upload your own. Google’s creative guide gives advice – aspirational imagery and copy is crucial.

Discovery ads in combination with responsive search ads serve up to five headlines and descriptions automatically. Google will also automatically choose call to action in your ads from ten options unless you choose for yourself. Based on geographic targeting, Google will show weekly impressions.

Keep in mind that this is one of Google’s automated universal campaign types, so smart bidding is required and Frequency and Ad Rotation are not available for this campaign type and also choose an average daily budget at least 10 times the value of your target cost-per-action (CPA) bid and wait for at least 40 conversions before making changes to your campaign.