Ecommerce buyers want proof of ROAS management across product catalogs — not just single-product campaigns. Managing paid ads for a 10,000-SKU ecommerce catalog is categorically different from managing a campaign for a single product or service, and the agencies that do it well have built specific systems and expertise around catalog-scale advertising.
What Catalog-Scale Ecommerce PPC Requires
Single-product advertising can be managed manually with basic platform tools. Catalog-scale advertising requires:
- Product feed management — ensuring accurate, optimized product data flows from your ecommerce platform to Google Merchant Center and Meta Product Catalog
- Performance Max and Shopping campaign structure for catalog coverage without manual keyword management at product level
- Profit-margin-aware bidding — optimizing toward margin-weighted ROAS rather than blended ROAS, since high-margin and low-margin products have different target ROAS thresholds
- Seasonal budget allocation — shifting spend toward high-performing categories and products in their seasonal peak
- Dynamic remarketing — showing ads featuring the specific products a user viewed but didn't purchase
The ROAS Conversation
Target ROAS for an ecommerce campaign should be set based on your margins, not an industry benchmark. A 300% ROAS (3:1 revenue-to-spend ratio) might be unprofitable for a business with 25% margins but highly profitable for one with 60% margins. An agency that proposes a ROAS target without first understanding your product margins and overhead structure is optimizing for the wrong thing.
Platform-Specific Expertise to Evaluate
- Google Shopping / Performance Max: Experience with product feed optimization, campaign structure for catalog segmentation, and Performance Max campaign management for ecommerce specifically
- Meta Catalog Ads: Dynamic product ads, catalog sales campaigns, and Advantage+ Shopping campaigns — Meta's increasingly automated ecommerce advertising system
- Pinterest / TikTok Shop: Emerging commerce platforms with different audience characteristics and creative requirements