Google Ads Display Mockup: Responsive Design Tutorial (2026)

Why Google Display Ads behave differently from social ads

Google Display Network ads run on more than 35 million sites and apps. Unlike social ads, which appear in a single feed format, Display ads render in dozens of different placement sizes and formats. A single creative needs to look right at:

Google's Responsive Display Ad (RDA) handles this by accepting multiple asset uploads (different aspect ratios) plus a list of headlines and descriptions. Google's machine learning combines them into placement-specific renders.

This tutorial covers the workflow for designing the asset bundle.

Step 1: Build the image assets

Google's Display Ad guidelines require the following minimum asset uploads:

For best coverage, also upload:

Step 2: Design with the placement context in mind

Display creative must work at small sizes (160 x 600 skyscraper, 320 x 50 mobile banner). At those sizes:

The fastest test: design at 1200 x 1200, then zoom out to 13% to simulate the mobile banner size. Does the creative still communicate?

Step 3: Write the headlines

Google's RDA accepts:

Each short headline should be self-contained — it might be paired with any of the 5 descriptions. Avoid headlines that depend on a specific description to make sense.

The first short headline often performs as the "primary" — write it carefully.

Step 4: Write the descriptions

Up to 5 descriptions, each ≤90 characters. Descriptions add context to the headline. They should not repeat the headline; they should expand on it.

Step 5: Choose the call-to-action button

Google's RDA lets you specify a CTA. The default is "Auto," which lets Google pick. For most direct-response campaigns, manually set "Shop Now," "Sign Up," or "Learn More" based on the campaign goal.

Step 6: Mock up the rendered ad

This is where Display Ads diverge from social ads. Google's machine learning will combine your assets, headlines, and descriptions into placement-specific renders. There is no single "ad" — there are dozens of variants.

Google Ads' built-in preview shows several common placements. For client approval, take screenshots of multiple placement renders so the client sees the variety.

AIPostMockup's social media tools handle social-format placements; for Display-specific placements, Google Ads' own preview is the source of truth.

Step 7: Verify cross-placement consistency

The asset bundle should produce coherent rendered ads regardless of which combination Google picks. The fastest test: run the Google Ads preview through 5-10 random placement combinations. Honest question: does each combination communicate the campaign promise?

If some combinations are confusing, the typical fix is to remove a weak headline or description from the bundle so Google has fewer combinations to make.

Step 8: Set up audience targeting

Display ads use a mix of:

For most direct-response campaigns, audience signals + topic targeting outperforms placement targeting.

Step 9: Submit for approval

Google's ad approval is automated. Most ads are approved within minutes; some are flagged for manual review (typically up to 24 hours). Common reasons for disapproval: trademark issues in headlines, unsupported claims, or images with too much text.

Common mistakes

What we noticed during testing

We built three test asset bundles during May 4-5, 2026. The most reliable predictor of CTR: the readability of the creative at small sizes. Bundles that read clearly at 320 x 50 banner size consistently outperformed bundles that only worked at 1200 x 1200 size, even though the smaller renders are a small share of impressions.

Disclaimer

Google's Display Ad product changes. Verify against Google's Display Ad guidelines before launching a campaign. AIPostMockup is not affiliated with Google Ads.