Introduction

For years, standalone Google Display campaigns have given advertisers a reliable set of levers. Build your audience, choose your placements, set your bids, and exclude what doesn’t work.

But starting in early 2027, Demand Gen campaigns will be your only option to advertise on the Google Display Network (GDN). Google will migrate any remaining eligible campaigns to Demand Gen. GDN inventory isn’t going away, but the campaign type that gave you direct control over it is.

On paper, Demand Gen seems like an upgrade. It offers expanded reach across YouTube, Discover, Gmail, Maps, and Display. Plus, it has lookalike segments, carousel ads, and generative AI tools.

But in practice, advertisers face issues including budgets spent on unintended audiences, reduced control over ad placements, and a lack of familiar campaign settings. Here’s how to tackle each Demand Gen challenge.

Challenge 1: Budget misalignment

By default, Demand Gen campaigns enable optimized targeting at the ad group level. This setting means the audiences you select become suggestions rather than choices.

Google uses them as a starting signal. Then it shows ads to anyone its system predicts will convert, whether or not they match your targeting.

Google has stated that it may use your signals on a limited basis or stop using them altogether if it identifies traffic that performs better. For advertisers with tightly defined audiences, that creates potentially serious problems:

  • Carefully built audiences become diluted: Remarketing lists, customer matches, and custom segments can end up with a small share of delivery.
  • The algorithm optimizes for what you measure, not what you want: If your conversion tracking counts low-value actions, the system will chase more of them — often from cheap, low-intent traffic.
  • Niche and qualified audiences suffer most: B2B, local, licensed, or regulated businesses can end up paying for clicks from people who could never become customers.
  • Reporting blurs the picture: Google Ads combines “expansion and optimized targeting,” making it harder to separate what your audiences drove from what Google added.

When you migrate Display campaigns to Demand Gen, Google carries over up to 42 days of performance history to shorten the learning period. But that history reflects Display rules and performance. Once optimized targeting starts expanding reach, the audience mix can shift quickly — with spend following closely behind.

Challenge 2: Less say in where your ads appear

Placement control was one of Display’s biggest strengths. Many advertisers developed extensive exclusion lists to negate parked domains, low-quality apps, advertising sites, and placements that burned budget without delivering results.

Migrated campaigns continue to opt into the GDN by default. While you can’t deselect the GDN during migration, you can opt to deliver campaigns on YouTube, Discover, Gmail, and Maps. With Demand Gen, you’ll find channel selection at the ad group level rather than the campaign level.

Yet topic and placement exclusions are no longer supported at the campaign or ad group level. You now manage all brand safety settings (inventory, content types, and labels) at the account level in your content suitability settings.

I recommend moving any campaign-level exclusions to the account level before migrating. But note that this change creates a trade-off:

  • Exclusions become all-or-nothing across every campaign in the account.
  • You lose the ability to allow a placement for one campaign while blocking it for another.
  • Testing placement strategies campaign by campaign becomes much harder.

Expanding into YouTube, Discover, Gmail, and Maps means Google can automatically shift budget between channels based on what’s performing well. But without close monitoring, spend can migrate toward inventory you never planned for — and away from the placements that were working for your brand.

Challenge 3: Lack of familiar campaign settings

Once you migrate GDN campaigns, you can’t go back. The GDN migration tool removes the original Display campaign and creates a new Demand Gen version in its place with a fresh daily budget. If performance drops, you can only rebuild.

Several familiar controls also disappear in the process:

  • Bidding: Manual cost per click (CPC), viewable impression (vCPM) bidding, and pay-for-conversions options are no longer accessible.
  • Adjustments: Bid adjustments, seasonality adjustments, and portfolio bid strategies have no direct replacement.
  • Audiences: You have to rebuild the combined audiences and the observation setting in the audience builder.
  • Measurement: Brand Lift and Search Lift studies aren’t supported, but Conversion Lift remains available.

Advertisers who relied on Display for tight, predictable delivery face a significant loss of control.

How to protect your ad budget before and after Demand Gen migration

You give Google control over the timing if you wait for automatic migration. Migrating on your own schedule gives you room to test, rebuild controls, and catch problems early.

Before you migrate

  1. Document everything. Export all placement exclusions, app exclusions, audiences, bid strategies, and device settings. You’ll need them to rebuild your Demand Gen campaigns.
  2. Audit account-level exclusions. Move exclusions to the account level, and check how they’ll affect every other campaign in the account.
  3. Start with a test. Run the migration on low-stakes campaigns first before touching your highest-spending ones.
  4. Tighten conversion tracking. Make sure you’re optimizing toward qualified leads or purchases, not soft actions like page views.

Immediately after migration

  1. Review every ad group and decide whether to keep optimized targeting on. Many advertisers start with it off and then test it once performance stabilizes.
  2. Set channel delivery controls. Limit channels to the ones you’ve planned for. Then, expand gradually.
  3. Monitor early and often. Watch placement reports, channel-level spend, and expansion and optimized targeting results closely during the first few weeks.

Ongoing for campaign health

  1. Reset key performance indicators (KPIs). Demand Gen behaves differently than Display. Set new benchmarks instead of expecting identical results.
  2. Let the creative qualify the audience. With fewer targeting levers, creative does more of the filtering. Use messaging that speaks directly to your intended audience — and discourages the wrong ones.
  3. Measure what matters. Track downstream results like lead quality, close rate, and revenue, not just cost per action (CPA) inside Google Ads.

Take control before Demand Gen takes over

The move from Display to Demand Gen is more than a new interface. It’s a shift in who controls your budget. More reach and automation can work, but only when advertisers stay vigilant of settings that matter.

When you make deliberate choices about channels and optimized targeting, rebuild brand safety control at the account level, and test campaign migration, you keep ad spend pointed at the people you want to reach.

Ultimately, you can’t undo the migration. But you can prevent wasted spend. Advertisers who plan now will be the ones who still have control when the switch to Demand Gen is complete.