Google Merchant Center Shopping Campaign Structure Guide

Campaign structure is one of the most impactful decisions in Google Shopping. Get it right and the algorithm can optimize efficiently. Get it wrong and you waste budget on broad audiences while underfunding your best products.

Standard Shopping vs Performance Max

Standard Shopping campaigns give you direct control over bid strategies and product group exclusions. Performance Max campaigns let Google's algorithm handle placement across Search, Display, YouTube, and Shopping simultaneously. In 2026, most accounts should have at least one Performance Max campaign, but keeping some standard Shopping campaigns gives you a control group for comparison.

Product Group Segmentation

Do not put all products in one ad group. Segment by category, brand, or custom label. This lets you apply different bids to different product sets and see which segments are profitable. A common starting point: segment by your top 20 percent of products by revenue, mid-tier products, and everything else. Bid aggressively on top performers and conservatively on the long tail.

Negative Keywords in Shopping

Shopping campaigns use product data to match queries, not keywords, but you can still add negative keywords to block irrelevant traffic. Review your Search Terms report weekly and add negatives for queries that bring clicks but no conversions. This is one of the quickest ways to improve ROAS without changing bids.

Budget Allocation

Give Performance Max campaigns a shared budget separate from your standard Shopping campaigns. This prevents one campaign type from cannibalizing the other's budget. Monitor impression share on your standard campaigns; if it falls below 70 percent, your budget is too low for the competitive landscape.