What is Zombie Products?

A Zombie Product is a Shopping or Performance Max product that keeps receiving clicks and spending budget while never producing a sale — typically 20 or more clicks with zero units sold.

Why it matters

Shopping campaigns spread budget across the whole catalog, and the algorithm keeps feeding products that attract clicks regardless of whether they ever convert. A single zombie burning $5/day sounds small — that is $150/month on a product that never sells, and most catalogs carry several.

How ClickCatalyst detects it

A product qualifies as a zombie when all conditions hold: zero units sold, at least 20 clicks (enough traffic to judge), and spend above a currency-adaptive threshold derived from the account's own average CPC — if an average click costs $2 the threshold is $40; at ₹5 it is ₹100. This prevents flagging products that barely spent anything.

Each zombie is cross-referenced against GA4 ecommerce data. If GA4 also shows zero purchases, the product is dead across both platforms and safe to exclude. If GA4 shows cart adds but no purchases, the product has demand but fails at checkout — a different problem.

Every confirmed zombie gets one of three verdicts: EXCLUDE (complete data, still no sales — a demand problem), FIX FEED (missing brand or category attributes are breaking Google's matching), or MONITOR (not enough data yet). A daily burn rate — total zombie waste divided by active days — makes the cost of waiting tangible.

Zombie conditions (ALL must be true):
  1. units_sold = 0 (or NULL)
  2. clicks ≥ 20
  3. cost > currency-adaptive threshold (≈ 20 × account avg CPC)

daily_zombie_burn = total_zombie_waste ÷ days_in_range

Example

In one audited account, a "Premium Leather Jacket" consumed $1,200 with 486 clicks and zero sales — invisible in campaign-level ROAS because the campaign's winners covered for it.