Google Demand Gen Campaigns: The Complete Guide for Modern Marketers

Discovery Ads Are Dead. Long Live Demand Gen.

In 2023, Google quietly retired Discovery Ads and replaced them with something far more powerful: Demand Gen campaigns. If you are still treating Demand Gen as a renamed version of Discovery, you are leaving serious performance on the table. This guide breaks down everything a performance marketer needs to know.

What Are Demand Gen Campaigns?

Demand Gen is Google’s AI-powered campaign type designed to generate demand — not just capture it. Unlike Search campaigns that reach users actively querying for solutions, Demand Gen targets users across YouTube (including Shorts), Gmail, and Discover feeds based on audience signals, interests, and behavioural patterns.

It is built for the consideration phase of the funnel: reaching the right audience before they start searching, so that when they do, your brand is already in their mental shortlist.

What Makes Demand Gen Different from Discovery Ads

The upgrade from Discovery to Demand Gen is not cosmetic. Demand Gen introduces YouTube video inventory (including Shorts and in-feed ads), lookalike audience targeting, an improved creative asset mix combining images and videos, and more granular bidding controls including Target ROAS and Maximize Conversions.

Perhaps most critically, Demand Gen provides better audience insights and reporting, giving marketers visibility into which creative formats are driving the most qualified engagement.

Setting Up a Demand Gen Campaign That Performs

Define your audience before touching the campaign interface. Demand Gen campaigns perform best when fed with rich audience signals: customer match lists, website visitors, YouTube viewers, and lookalike segments built from your highest-LTV customers.

Creative variety is non-negotiable. Google’s AI needs assets to test — upload portrait and landscape images, 6-second bumper videos, 15-30 second YouTube ads, and HTML5 assets where applicable. Campaigns with more asset variety consistently outperform those with limited creative.

For bidding, start with Maximize Conversions if your pixel has fewer than 50 conversions per month. Once you hit consistent volume, switch to Target CPA or Target ROAS for efficiency optimisation.

Audience Strategy: Where Most Campaigns Fail

The most common Demand Gen mistake is broad audience targeting with generic creative. The combination produces low-quality impressions, poor CTRs, and disappointing ROAS.

Instead, layer your audiences: start with customer match (your existing buyers), then build a lookalike from your top 10% customers by LTV, then add in-market segments relevant to your product category. Run separate ad groups for each audience tier with tailored messaging — your retention creative for existing customers looks very different from your acquisition creative for cold audiences.

Measuring Success Beyond Click-Through Rates

Demand Gen campaigns influence purchase decisions days or weeks before a conversion event. Measure view-through conversions (with an appropriate window of 3-7 days), brand search lift, and assisted conversions in addition to direct conversion metrics. Evaluating a Demand Gen campaign purely on last-click ROAS will consistently undervalue its contribution to revenue.

Key Takeaway

Demand Gen campaigns represent Google’s most sophisticated tool for upper-funnel growth. Brands that master creative variety, audience layering, and measurement beyond last-click attribution will use Demand Gen to build brand awareness that converts — not just impressions that inflate reach metrics.