Multiple plugins (SEO, analytics, conversion tracking) fire duplicate events or conflict with each other, causing inflated conversion counts and broken attribution.
Example: 3 different plugins all firing purchase events, reporting 3x actual conversions
Free or basic feed plugins generate incomplete product data, missing GTINs, poor categorization, and no custom labels—killing your Shopping campaign performance.
Example: Feed missing 40% of required attributes, products stuck in 'Limited' status
WooCommerce variable products create feed nightmares—parent/child relationships break, variations show wrong prices, and inventory sync fails during sales.
Example: Size variations showing $0 price, entire product groups disapproved
Heavy plugins and unoptimized hosting tank your page speed, hurting Quality Score and conversion rates. Google penalizes slow landing pages with higher CPCs.
Example: 4-second load time causing 40% bounce rate and $0.30 CPC premium
WooCommerce's multi-page checkout creates tracking holes. Users drop off between cart and payment, but you can't see where or retarget them properly.
Example: 60% cart abandonment with no data on which step loses customers
With a single asset group, Google optimizes for aggregate ROAS by heavily favoring your top 5-10 products. The rest of your catalog gets almost no impressions. Worse, low-margin products drag down profitability while appearing successful in aggregate.
Fix: Segment products by performance tier: Winners (scale), Potentials (test), Underperformers (cut or fix). Create separate asset groups for each.
PMax claims credit for brand searches that would've cost $0.30 through a dedicated brand campaign. Without exclusions, you're paying 3-5x more for customers already looking for you.
Fix: Add brand exclusions to PMax and run a separate Brand Search campaign with exact match keywords.
Missing GTINs, generic titles, no custom labels, and missing sale prices hurt your Shopping ad performance. Missing GTIN/MPN for variable products
Fix: Use dedicated feed plugin (CTX Feed, Product Feed Pro, or Channable)
Your 5x ROAS might look great until you realize 70% of sales are repeat customers who would've bought anyway. You're paying to acquire customers you already have.
Fix: Segment reporting by new vs returning customers. Set up customer match lists and analyze true CAC.
Not all campaign types work for woocommerce stores. Here's what to skip:
Amplifies feed errors across all Google properties
Deprecated, migrate to PMax or Standard
Low intent, poor conversion for most WooCommerce stores
Follow these best practices to maximize your WooCommerce Google Ads performance:
Budget: 40-50% • Target ROAS: 3.5-5x
Budget: 10-15% • Target ROAS: 6-10x
Budget: 25-35% • Target ROAS: 2.5-4x
Budget: 10-15% • Target ROAS: 4-7x