Fashion E-commerce: Conversions Doubled While CPA Dropped 29%

A professional-tier e-commerce account in the Fashion & Apparel vertical operating at a $7,200 monthly Google Ads budget grew conversion volume from 723.81 to 1,519.36 (+109.91%) and reduced cost-per-acquisition from $16.36 to $11.64 (-28.85%) over a 90-day optimization window. ROAS lifted from 2.53x to 3.26x, crossing above the stated 3.2x target.

Key Takeaways

• Conversion volume doubled (+110%) on a 49% spend increase.
• CPA reduced 29% despite the significant scale-up.
• ROAS crossed above the stated 3.2x target, landing at 3.26x.
• Conversion value nearly doubled from $29,937 to $57,618 (+92.5%).

The Account

A professional-tier e-commerce retailer in the Fashion & Apparel vertical operating nationally on a $7,200 monthly budget. The stated target ROAS is 3.2x. The account was operating modestly below target at baseline (2.53x), with the team identifying significant untapped volume potential.

The Challenge

Metric	Baseline (90 days)
Spend	$11,841.16
Conversions	723.81
Conversion Value	$29,937.15
CPA	$16.36
ROAS	2.53x
CTR	1.26%

The account had a healthy conversion volume but was missing its efficiency target by a clear margin. The team identified that structural optimization could both improve the hit rate and unlock additional volume simultaneously.

The Approach

Step 1: Search-terms audit. Flagged terms were excluded across all active campaigns. With over 46,000 clicks in the baseline period, the search-terms report contained substantial signal.

Step 2: Performance Max asset group refinement. Campaigns like “P Max - Shopping - Profumi” were reviewed and refined.

Step 3: Negative keyword expansion. Multiple weekly review sessions produced cumulative exclusions covering the most common low-intent query patterns.

Step 4: Budget scale-up on working segments. As efficiency gains were confirmed, budget was expanded on the campaigns that were converting.

The Results

Over the 90-day optimization window (September 16 to December 14, 2025):

Metric	Before (90 days)	After (90 days)	Change
Spend	$11,841.16	$17,686.75	+49.4%
Conversions	723.81	1,519.36	+109.9%
Conversion Value	$29,937.15	$57,618.23	+92.5%
CPA	$16.36	$11.64	-28.9%
ROAS	2.53x	3.26x	+28.9%
CTR	1.26%	1.55%	+23.3%

Conversion volume growing at twice the rate of spend growth (+110% vs. +49%) is a clear efficiency signature. Hitting the 3.2x ROAS target in a single quarter is a meaningful milestone for an account that was previously adrift.

Lessons Learned

1. Fashion e-commerce can absorb substantial scale. The vertical has deep demand pools, so accounts that improve their efficiency infrastructure can typically absorb significant budget increases without losing efficiency.

2. Hitting target in a single quarter is a healthy pace. This account moved from 2.53x to 3.26x in 90 days, crossing above target. Most accounts need 2-3 quarters for a similar move.

3. Conversion count growing faster than conversion value is a watch signal. The delta (+110% conversions vs. +93% value) suggests a slight mix shift toward lower-value orders. This is not a problem at current margins, but it is a signal to monitor in the next quarter.

4. Scale-up and efficiency can both improve in the same window. The conventional framing of optimization as a tradeoff between volume and cost is often wrong when the starting point has meaningful waste.

Methodology Note

Data sourced from a managed Google Ads account in the Fashion & Apparel vertical operating at the professional budget tier. All identifying information has been removed. Performance metrics reflect the best 90-day window (September 16 to December 14, 2025) compared against the prior 90-day baseline (June 17 to September 15, 2025). The account executed 49 documented optimization actions during the measurement period. Metrics reported in USD.