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What to Test in November to Improve December Campaign Performance

What to Test in November to Improve December Campaign Performance

November is the final window for strategic testing before the most competitive advertising weeks of the year. With rising CPMs and shifting consumer intent in December, the brands that thrive are those that use November to refine audience segments, creative direction, and budget allocation. Below are the essential tests to prioritize and why they matter.

1. Test Audience Segmentation

November is ideal for identifying which audiences respond best before December traffic spikes.

What to test:

  • Narrow vs. broad audience segments

  • Warm vs. cold audiences

  • Different lookback windows for engaged users

Stacked bar chart showing 75 % of consumers start holiday research before mid-November, and 79 % spread purchases across November to December

Three-quarters of shoppers begin research by mid-November, and nearly eight in ten spread buying through Nov–Dec

Why it matters:
Consumers begin browsing earlier, and data shows that over 60% of holiday shoppers start researching by mid-November, giving you enough signal to optimize audiences before costs rise.

2. Test Ad Creatives

Creative fatigue increases quickly during holiday promotions, so November is the time to understand which messages and visuals resonate.

What to test:

  • Static vs. video formats

  • Promotional vs. value-focused messaging

  • Different visual styles and color palettes

Useful statistic: Studies show that ads with strong value propositions can increase CTR by 30%, making it critical to learn which angle performs best.

3. Test Landing Page Variants

A small improvement in post-click experience can significantly lift December results.

What to test:

  • New headline variations

  • Simplified layouts

  • Short vs. detailed product descriptions

Line chart illustrating conversion rate uplift: baseline 100 % rising to approximately 110 – 125 % after landing-page optimisation

Simple landing-page changes can lift conversion by 10-25%

Useful statistic: Research indicates that conversion rates can improve by 10–25% through simple landing page optimizations.

4. Test Offer Structures

Consumers respond differently to pricing models during the holiday season.

What to test:

  • Percentage-based discounts vs. fixed-value discounts

  • Bundles vs. single-item promotions

  • Free shipping thresholds

Testing incentives early helps determine which offer drives the highest conversion rate at the lowest cost.

5. Test Budget Allocation

Budget pressure increases in December, making efficiency critical.

What to test:

  • Even daily budgets vs. accelerated spending during high-traffic periods

  • Allocating more to high-performing audiences or creatives

  • Testing bid caps vs. cost caps for stability

Advertisers see a 15–25% increase in CPMs during December, so testing now reveals the most profitable strategy.

6. Test Retargeting Windows

Buyer behavior changes rapidly in Q4, and retargeting windows need to adapt.

What to test:

  • 1-day, 3-day, 7-day, and 14-day retargeting windows

  • Specific product viewers vs. cart abandoners

Shorter windows often capture intent better during peak season when decisions are made faster.

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