Display Network

The Google Display Network is the collection of websites, apps, and Google-owned properties such as YouTube and Gmail where Google can show banner, image, and native ads. Google's help page describes reach across millions of sites and apps. People see these ads while reading, watching, or using an app, not while searching, so the format is built to catch attention rather than answer a question. Advertisers have long run it as a separate campaign type named Display, but that is changing, as covered below. Ad formats include responsive display ads and uploaded image ads, and the placement is decided by the audience and content settings you choose.

Targeting works by audience, content, or placement. Google says optimized targeting is the default and uses signals such as keywords on your landing page, though you can choose a different method. Audiences include your own data segments, for example people who visited your site. Ads are mostly responsive display ads built from the images, logos, headlines, and descriptions you upload, with uploaded image ads as an alternative. Smart Bidding is recommended, and with Target CPA you can pay for conversions rather than clicks. Because inventory is bought on reach, click and conversion rates sit well below Search. Smart Bidding can reduce manual effort, but it still needs conversion data, so check that tracking works before trusting automation.

The bigger change is structural. Google says Display campaigns now live in Demand Gen as Google Display Network campaigns. Your ability to serve on the GDN stays the same, but Demand Gen adds YouTube, Discover, and Gmail in one campaign type, along with lookalike segments and carousel ads. A migration tool began rolling out in phases from June 2026, and Google says that later, new Display campaigns can only be created in Demand Gen, and remaining eligible campaigns will migrate automatically. Migrated campaigns are renamed with #2, cannot be reverted to Display, and carry up to 42 days of performance history. If you plan to keep running Display, test a small Demand Gen campaign alongside it so you learn the new setup before any forced move.

The common errors are about measurement and cleanup. Judging Display on last-click conversions ignores that it often starts a path that Search finishes. Leaving automatic targeting and broad inventory unreviewed lets money drift to low-quality apps and sites you would never choose. Skipping the placement report means you never find out where ads ran. Another mistake is running Display with weak assets: tiny logos, one image shape, and no preview check. And with migration coming, ignoring Google's notices about blockers can cause serving gaps when ads are re-approved. Apps deserve special attention, because accidental taps on game ads can inflate clicks with no business value.

This week, open your Display or Demand Gen campaign and check the placements report for sites and apps that waste money, then exclude them. Review your audience segments, especially remarketing lists, and compare cost per conversion for remarketing versus prospecting audiences. Read Google's migration notes and fix blockers such as missing logos or unsupported disclaimer formats before they force a change. Decide in advance how you will judge Display, with view-through conversions, assisted conversions, or a lift study, so it is not cut for a metric it was never built to win. Save your performance history and notes, since the removed original campaign remains available for reporting for up to 5 years.