How Does the Display Network Work?
When someone reads an article on a news site or uses a mobile app, they often see banner ads in the margins or between content. A large portion of those ads run through Google's Display Network. Google decides who sees your ad by analysing each person's past browsing and search behaviour — so you can re-appear in front of someone who looked at your product days ago but didn't purchase.
- Brand awareness: Reaching potential customers who don't know you yet with a visual impression. If you want your logo and message to stick, Display is the right tool.
- Remarketing: Showing ads to people who visited your site but left — for example, reminding someone who added a product to their cart but didn't check out.
- New product or campaign announcements: Visually informing your existing audience and relevant prospects about a launch or promotion.
- Cost-efficient reach: Cost-per-click is typically lower than search, making it possible to reach a large audience on a smaller budget.
Over 2 million sites and apps
According to Google's official data, the Display Network works with this many publishers, giving advertisers the potential to reach the vast majority of internet users worldwide.
Display has an important limitation: users aren't actively searching for anything. Purchase intent is lower than in search campaigns. Expecting direct high sales from Display alone isn't realistic — this channel works best alongside search ads, focused on awareness and remarketing.
Key Things to Watch Out For
- Placement control: Your ad can appear on irrelevant or low-quality sites. Regularly review where your ads show and exclude unsuitable placements.
- Creative quality: Banner ads have specific size and design requirements. Blurry or poorly proportioned images may prevent your ad from running.
- Audience definition: Overly broad targeting can burn through budget quickly. Filters like interests, demographics, or remarketing lists direct your spend more precisely.
- Conversion tracking: Without measuring how many people saw your ad and then visited your site or purchased, you can't know which placements are working.
- Smart bidding: As of 2026, Google offers smart bidding strategies such as Target CPA and Target ROAS for Display campaigns, automatically optimising bids using machine learning.
If your remarketing list has at least a few hundred people, starting Display campaigns with that audience is the most measurable entry point. Focusing on people who already know you but haven't decided yet tends to deliver faster results than reaching cold audiences from scratch.