Performance Max Campaigns: The Complete Guide for 2026

By Raphaël Dumont

Performance Marketing Specialists Reviewed by Senior Media Buyers

Published February 9, 2026

Updated 4 April 2026 · 14 min read

Performance Max (PMax) is Google's most powerful campaign type, and its most misunderstood. PMax campaigns serve ads across every Google property (Search, Display, YouTube, Gmail, Maps, and Discover) using AI-driven optimisation to find conversions wherever they occur. When configured correctly, PMax delivers exceptional results. When configured poorly, it wastes budget on low-quality placements. This guide shows you how to get it right.

What Is Performance Max?

Performance Max is a goal-based campaign type that uses Google's AI to optimise across all Google channels simultaneously. Instead of creating separate campaigns for Search, Display, YouTube, and Shopping, you create one PMax campaign with asset groups, audience signals, and conversion goals, and Google's algorithm decides where, when, and how to show your ads.

Key characteristics of Performance Max:

• All-channel reach: A single campaign serves across Search, Shopping, Display, YouTube, Gmail, Maps, and Discover
• AI-driven optimisation: Google's machine learning determines bidding, targeting, and placement for each impression
• Asset-based creative: You provide text, images, and videos, Google assembles them into ads optimised for each placement
• Audience signals: You provide hints about your target audience, Google uses these as starting points for its optimisation
• Automated bidding: Target CPA or Target ROAS bidding is required. Manual bidding is not available

When to Use Performance Max

• E-commerce with product feeds: PMax replaces Smart Shopping and extends reach across all channels. Provide your product feed and let the algorithm optimise
• Lead generation with sufficient volume: If you generate 30+ conversions per month, PMax can optimise effectively across channels
• Scaling beyond Search: When your Search campaigns are mature and you want to expand reach, PMax extends to Display, YouTube, and Discover
• New market expansion: PMax is effective for finding new audiences when you are entering new geographic markets or audience segments

When NOT to Use PMax

• Low conversion volume: Below 15-20 conversions per month, PMax does not have enough data to optimise effectively
• Need for granular control: PMax provides limited reporting and targeting control. If you need keyword-level optimisation, use standard Search
• Brand protection: PMax can cannibalize branded search traffic. Always run branded keywords in a standard Search campaign alongside PMax

Setting Up Performance Max Correctly

Asset Groups

Asset groups are the building blocks of PMax campaigns. Each asset group contains a theme of assets (text, images, videos) and a target audience signal. Create separate asset groups for distinct product categories, service lines, or audience segments.

• Provide maximum assets: 15 headlines (5 short + 10 long), 5 descriptions, 15 images, 5 videos, 5 logos
• Include a variety of angles in your headlines: features, benefits, social proof, urgency, and questions
• Provide images in all required sizes: landscape (1200x628), square (1200x1200), and portrait (960x1200)
• Upload video in both landscape and vertical formats for YouTube and Shorts placements
• If you do not provide videos, Google will auto-generate them from your images, these rarely perform well. Invest in real video assets

Audience Signals

Audience signals tell Google who you are trying to reach. They are not hard targeting, Google uses them as suggestions and expands beyond them based on performance. Strong audience signals accelerate the learning phase.

• Customer lists: Upload your customer email list. This is the strongest signal, it tells Google exactly who your buyers look like
• Website visitors: Add your remarketing audiences as signals
• In-market audiences: Select relevant Google in-market categories
• Custom segments: Create segments based on search terms your ideal customers use or websites they visit

Optimisation Strategies

PMax optimisation is different from standard campaign optimisation because you have less direct control. Instead of adjusting bids and keywords, you optimise through signals, assets, and structural changes:

• Respect the learning phase: Do not make changes during the first 2 to 4 weeks. The algorithm needs time to test and learn
• Monitor asset performance: Google rates each asset as "Low," "Good," or "Best." Replace low-performing assets with new variations monthly
• Refine audience signals: Add more customer data and conversion signals as they become available. Better signals = faster optimisation
• Exclude brand terms: Add your brand keywords as brand exclusions in PMax to prevent cannibalization of your branded Search campaigns
• Review placement reports: Monitor where your ads appear. Exclude low-quality URLs and apps that generate clicks without conversions
• Increase budget gradually: Scale PMax budgets by 15-20% per week maximum. Large sudden increases reset the learning phase

PMax vs Standard Search: How They Work Together

The optimal structure runs both, standard Search campaigns for your proven, high-intent keywords (including brand terms) and PMax for broader reach and discovery. PMax fills in the gaps that Search campaigns miss, finding prospects on YouTube, Display, and Discover who would never have searched for your keywords.

Account Quality Matters for PMax

Performance Max campaigns rely heavily on historical account data. Aged Google Ads accounts with established conversion history give PMax a significant head start, the algorithm begins with proven data about what converts rather than starting from zero. Accounts with strong compliance history also receive better placement access across the Google network.

Frequently Asked Questions