Google Performance Max Creative Assets: A Practical Guide

Last Updated: November 12, 2026

Table of Contents

• What Google Performance Max Creative Assets Actually Include
  • Asset Groups: The Container for Every Creative
• Performance Max Image Sizes and Specifications That Matter
  • Aspect Ratios, File Formats, and Size Limits
  • Safe Zones and How Assets Crop Across Placements
• Performance Max Headlines and Descriptions: Writing Text Assets That Convert
• Performance Max Asset Group Best Practices for Ecommerce
  • Grouping Products and Themes Correctly
• Performance Max Creative Examples for Ecommerce Brands
• Building a Practical Asset Workflow from Brief to Upload
• Measuring Asset Performance and Knowing When to Refresh
  • A Testing Method That Survives Scrutiny
  • When to Refresh
• Book a Free Creative Audit Before Your Next Campaign
• Frequently Asked Questions

What Google Performance Max Creative Assets Actually Include

Google Performance Max creative assets are the images, logos, videos, headlines and descriptions you upload into an asset group so Google can build ads across Search, Display, YouTube, Discover, Gmail and Maps. This guide covers what each asset type requires and how to produce them.

The short version: Performance Max is not one ad. It is a pool of parts. Google mixes those parts into many combinations, per channel and per user.

That is why asset quality decides performance more than bidding does. Weak assets give the system weak combinations to work with.

Asset Groups: The Container for Every Creative

An asset group is the bundle of creative assets and audience signals built around one product theme. Every campaign needs at least one.

Google requires a minimum set inside each group: a few images, a logo, headlines and descriptions, plus business name and final URL. Video assets are optional but recommended.

A common mistake is dumping every product into a single asset group. The system then has no clear theme to match against search intent.

Performance Max Image Sizes and Specifications That Matter

The image specs that matter most are the 1.91:1 landscape, 1:1 square and 4:5 portrait ratios. Google's official Performance Max creative asset specifications list these as the core image shapes, and the system uses each shape for different placements: landscape for Display and Discover, square for feed-style and Shopping surfaces, portrait for mobile-first placements.

Upload all three ratios per asset group. Google recommends it, and skipping a ratio quietly removes your ad from placements where that shape is required.

Aspect Ratios, File Formats, and Size Limits

The practical rules are simple:

• Landscape: 1200 x 628 px, 1.91:1
• Square: 1200 x 1200 px, 1:1
• Portrait: 960 x 1200 px, 4:5
• Formats: JPG or PNG

Check Google's live asset specifications before every major upload, as limits can change.

Safe Zones and How Assets Crop Across Placements

Google overlays headlines, descriptions, the business name and a call-to-action button on top of your image in many placements. That overlay sits in different positions depending on the surface, so the only reliable rule is to keep the product and any critical detail inside a centered safe zone and leave the outer edges visually quiet.

A common pattern is to design the master image at 1200 x 1200 px with the product occupying roughly the middle 60 percent, then crop to landscape and portrait from that master.

Watch out: text baked into an image gets cropped or covered by Google's overlays on some placements, and Google's own policy discourages text-heavy images. Keep the product centered and the edges clean.

For a deeper method on building image creative that holds up at scale, see our guide on how to create static ad creative that scales on Meta. The cropping discipline is the same; only the placement list changes.

Performance Max Headlines and Descriptions: Writing Text Assets That Convert

Headlines and descriptions do more work than most brands expect. Google combines them freely, so each line must stand alone.

Headlines and descriptions are character-limited, so write each one to fit its slot.

Write each headline as a complete idea:

• Lead with the product benefit, not the brand name
• Include the price or offer where it fits
• Avoid repeating the same phrase across slots
• Keep one headline focused on the call to action

Descriptions should add proof: shipping terms, materials, guarantee details. Do not just restate the headline.

A common mistake is writing one strong headline and filling the rest with filler. Google tests combinations, so a weak slot drags down the whole group.

Performance Max Asset Group Best Practices for Ecommerce

The best-performing asset groups share one trait: a single clear theme. Group by product category, margin tier or campaign goal, not by whatever is easiest to export from your feed.

Grouping Products and Themes Correctly

Start with your product feed, then split it into themes a shopper would recognize. Running shoes and formal shoes belong in separate groups, even if they share a category in your admin.

Then add audience signals to each group. Signals guide early learning; they do not lock the campaign in.

Keep these practices in mind:

• One theme per group, with matching images and text
• Upload every available ratio and at least one video
• Refresh low-rated assets monthly
• Localise copy for each market you sell into

For brands weighing UGC against produced creative, our breakdown of UGC versus studio creative for Meta ads covers what tends to convert and when.

Conversion Design produces static ads, UGC, video and B-roll for Google, Meta and TikTok, so asset groups can be filled from one production team.

Performance Max Creative Examples for Ecommerce Brands

Strong creative examples for ecommerce tend to follow a few patterns. A skincare brand might show the bottle on a bathroom shelf in landscape, a close-up texture shot in square, and a hand-held product in portrait. Same product, three shapes, one message.

Apparel brands do well with lifestyle scenes and clean packshots side by side. The lifestyle image carries emotion; the packshot carries the product detail Google needs for Shopping placements.

Local market examples matter too. A store selling into Slovenia and neighbouring markets needs copy and imagery that fit local taste, not translated English ads.

We build these sets as fixed monthly output: static ads, UGC videos, B-roll and the landing pages behind them. You can see the format and scope on our performance creative service page, or browse the work itself to judge production quality before you commit.

Building a Practical Asset Workflow from Brief to Upload

A repeatable workflow beats a heroic one-off shoot. Here is the process we use, from brief to upload.

Step 1: Write the brief per asset group. One page. Theme, audience, offer, three message angles.

Step 2: Shoot or design for all three ratios at once. Frame wide, then crop. Do not resize a square into a landscape.

Step 3: Produce video in 16:9, 1:1 and 9:16. Keep the first two seconds strong; that is what runs on YouTube and Discover.

Step 4: Write text assets to fill every slot. Headlines, long headlines, descriptions, business name.

Step 5: Run a mobile and accessibility check. Read text at phone size. Check contrast. Add alt text where the platform allows it.

Step 6: Upload, tag by theme, and log what went live. A simple sheet prevents duplicate assets and lost files.

Two more steps belong in the workflow: a rights and consent check on every person and song in the creative, and a localisation review before anything ships to a new market.

Measuring Asset Performance and Knowing When to Refresh

Google rates each asset as Best, Good or Low inside the asset report. That rating is your first signal, not your only one. The rating reflects how often an asset was served and how it compared to other assets in the same group; it is not a verdict on conversion value.

Read it alongside conversion value and return on investment at campaign level. A "Low" asset in a profitable campaign is not automatically a problem; a "Best" asset in a losing campaign is not a win. The rating tells you what Google served, not what made money.

A Testing Method That Survives Scrutiny

Asset-level data is noisy because Google mixes assets into combinations, so you rarely see one asset in isolation. Treat the asset report as a diagnostic, not an experiment. To make a real decision, run controlled refreshes:

• Change one variable per refresh. Swap the image set but keep text and video identical, or rewrite headlines but keep visuals fixed. If you change everything at once, you learn nothing.
• Give each refresh a full conversion cycle. Allow enough time for the group to accumulate conversions before comparing it against the prior period. Short windows produce false winners.
• Compare cohorts, not single assets. Judge the refreshed group against the same group's prior period, not against a different theme or a different campaign.
• Log the change date and the hypothesis. A simple sheet with date, asset changed, hypothesis and result prevents the pattern where a team refreshes constantly and cannot explain what worked.

Attribution across channels is imperfect, so judge creative in cohorts and accept that some lift will be unattributable. The goal is directional confidence, not statistical proof from a platform that was not built as a testing tool.

When to Refresh

Refresh on a schedule, not on panic:

• Replace Low-rated assets monthly, but only after checking whether the rating is driven by low delivery rather than poor performance
• Swap seasonal creative before the season, not during it
• Retire any asset that has run unchanged for a full quarter
• Keep one test slot per group for new concepts so testing never competes with your proven set

If you want a method for tying creative tests to sales, our article on measuring creative testing's impact on sales walks through it.

Book a Free Creative Audit Before Your Next Campaign

Most Performance Max campaigns underperform because the asset pool is thin, not because the bidding is wrong. Fix the inputs and the system has something to work with.

Conversion Design handles Shopify Plus design and development, ecommerce CRO, and performance creative for Google, Meta and TikTok under one fixed scope and price. Senior team members do the work, and stores can be migrated with zero-downtime cutovers. We are trusted by more than 200 DTC and ecommerce brands and operate across 30 markets, from our base in Ljubljana.

If your asset groups look thin, start with a free audit.

Bring us your weakest asset group and we will tell you exactly what is missing. Get started with Conversion Design and give Google a creative pool worth optimizing against.

Add conversion-design.com as a preferred source on Google →