Google Demand Gen / Discovery Ads: Practical Guide (2026)

Demand Gen campaigns (formerly Discovery, now consolidated under Demand Gen as of 2024+) place your image and video ads in YouTube Shorts, Discover feed, Gmail, and YouTube In-feed surfaces.

For ecom brands, Demand Gen is most effective for visually appealing products that benefit from discovery-style placement. Think: fashion, beauty, food, lifestyle.

TL;DR

Best for: visual ecom (fashion, beauty, food, home).

Worst for: services, B2B, low-AOV commodity.

Setup: Demand Gen campaign with image + short video assets.

Cost: typically lower CPM than YouTube In-stream.

Performance: longer attribution windows; harder to evaluate quickly.

What surfaces does it cover

Demand Gen ads appear on:

YouTube Shorts feed.

YouTube Home feed (in-feed ads).

Google Discover feed (mobile only).

Gmail Promotions tab.

These are "discovery" surfaces — users browsing, not searching. Demand Gen complements Search (which captures intent) by creating new demand.

When Demand Gen works

Ideal for:

Stores with strong visual creative (lifestyle photography, beauty, fashion).

Brands launching new products.

Categories where impulse purchase is common.

Less ideal for:

Service businesses.

High-consideration B2B.

Non-visual products (subscriptions to data services, SaaS, etc.).

Step 1: Campaign creation

Google Ads → Create campaign → Sales objective → Demand Gen.

Campaign settings

Budget: ₱1,500–₱3,000/day to start.

Bidding: Maximize Conversions (later, Target CPA).

Locations: Philippines.

Languages: English + Tagalog.

Step 2: Audience targeting

Demand Gen supports several audience types:

Lookalike (similar segments)

Built off your customer match list or website visitors. Most effective.

Detailed Demographics + Affinity

Predefined audiences relevant to your category.

Custom Audiences

Built from URLs, keywords, apps users use.

Customer Match

Upload your email list.

For new launches: start with Lookalike + relevant Affinity.

Step 3: Creative assets

Demand Gen needs strong visual creative. Google supports:

Single image (1:1, 1.91:1, 4:5).

Carousel (2–10 images).

Video (9:16 vertical, 1:1 square, 16:9 horizontal).

Product feed ads (when linked to Merchant Center).

Best-performing format

For ecom: short vertical videos (9:16, 6–15 seconds) tend to outperform.

For fashion/beauty: lifestyle imagery in carousel.

For food: appetizing close-ups + people enjoying.

Asset diversity

Provide multiple aspect ratios. Google rotates based on placement.

Step 4: Headlines and descriptions

Up to 5 headlines (40 chars), 5 descriptions (90 chars).

Tips:

Lead with benefit, not feature.

Include specific numbers when possible.

Keep tone conversational.

Examples:

Headline: "Hair oil that fixed my dry ends"

Description: "Free shipping over ₱1,500. Cleared my dry ends in 3 weeks. Try ₱200 off."

Step 5: Product feed integration

Linking your Merchant Center to a Demand Gen campaign enables:

Product overlays on creative.

Dynamic product remarketing.

Catalog-style ads in the feed.

Best for ecom with 20+ active products.

Step 6: Bidding strategy

Same progression as other Google campaigns:

First 14 days: Maximize Conversions.

Days 15–30: Target CPA.

30+ days: tighten Target CPA based on real performance.

Demand Gen takes longer to optimize than Search. Be patient.

Step 7: Attribution considerations

Demand Gen often shows results across longer windows:

View-through conversions inflated.

Multi-touch attribution important.

For real performance, look at:

Click-through conversions (most reliable).

Engaged-view conversions (Demand Gen view AND a later conversion within 3 days).

Compare to baseline (run a holdout test).

Don't trust raw "Demand Gen ROAS" without context.

Step 8: Measuring incrementality

Demand Gen often gets credit for conversions that would happen anyway. To measure incrementality:

Run a 30-day "off" test on a subset of audience or geography.

Compare overall sales during off period to on period.

Calculate incremental revenue.

This is harder than for Search. Most operators don't do this rigorously, but it's worth the effort for accounts spending $5K+/month on Demand Gen.

Common Demand Gen mistakes

1. Treating it like Search

Demand Gen is discovery-style, not intent-driven. Different mindset, different creative.

2. Reusing static product photos

Discovery surfaces favor lifestyle and editorial content over plain product shots.

3. Not providing video

Video usually outperforms static on Demand Gen.

4. Targeting too broadly

Without good audience signals, Demand Gen wastes spend on unqualified users.

5. Comparing to Search ROAS directly

Demand Gen serves a different funnel position. Don't expect Search-level ROAS.

When NOT to use Demand Gen

Skip Demand Gen if:

Budget is below ₱1,500/day (algorithm needs scale).

You have no quality visual creative.

You're a service business.

You're already maximizing PMax (which covers many of the same surfaces).

Demand Gen vs Performance Max

PMax includes Discovery and YouTube placements automatically. So why use Demand Gen separately?

Use Demand Gen when:

You want creative-specific control over visual ads.

You want to test specific audiences.

You want isolated reporting on Discovery performance.

Skip Demand Gen when:

PMax is already running and performing.

You don't have bandwidth to manage another campaign.

Budget allocation

For ecom stores running multiple Google campaigns:

50–60% PMax.

20–25% Brand Search.

15–20% Demand Gen (if running).

5% YouTube In-stream.

Want help with Demand Gen?

Demand Gen creative and audience setup takes effort. My Google Ads Specialist service covers Demand Gen campaigns. Or learn the system in the Google Ads Course Philippines.