For MyNextMattress · Confidential

Experimentation driven business growth PDP MAB Test
Hypotheses

Five Multi-Armed Bandit experiments designed for MyNextMattress PDPs — each targeting a specific friction point on the path from product page to add to basket.

What is MAB? → Jump to tests
5
Test hypotheses
3×
High priority · low effort
Testing Methodology

What is a Multi-Armed Bandit test?

A Multi-Armed Bandit (MAB) test runs alongside a classic A/B test, but instead of splitting traffic evenly across all variants for the full duration, it automatically shifts allocation toward the best-performing variants as evidence accumulates — minimising lost conversions during the test.

Classic A/B/n Test — Fixed Allocation

Traffic split stays even across all variants until the test ends.

Multi-Armed Bandit — Dynamic Allocation

Traffic shifts toward the winner as evidence accumulates — minimising lost conversions.

Two stacked bar charts comparing fixed 25/25/25/25 allocation in a classic A/B/n test against dynamic allocation in a Multi-Armed Bandit test, where the winning variant grows from 25% in week 1 to 70% by week 4
When to use MAB: when the goal is to ship the winning variation fast and maximise conversions during the test — ideal for high-traffic pages with several plausible variants, where precise lift measurement matters less than capturing the uplift.
Proposed Experiments

Five tests for the product detail page

Each test below applies to MyNextMattress product detail pages. Every hypothesis includes the proposed variants, success metrics, and an estimated effort tier so the team can sequence them by impact.

1
Product Description Page

Test % Off vs. £ Saving Framing

Problem
The price block shows the discount as a £ amount (e.g., "You save £301"). Mattress shoppers compare value across sites, and % off may communicate the discount more immediately than an absolute saving.
Hypothesis
If we test a percentage badge (e.g., "20% OFF") against the current £ saving badge, users may grasp the discount more immediately. Supporting signal: our welcome email flow saw stronger engagement with a 5% off incentive than a fixed-sum offer — suggesting % framing is perceived more favourably.
Proposed Treatment
MAB test 1 new variation against control: (1) £ saving badge (current as control), (2) % off badge replacing the £ amount. Keep the strike-through anchor price in both.
KPIs
Primary: Add to cart  ·  Secondary: Revenue
Desktop Mobile High priority Low effort
Proposed treatment — % off vs. £ saving
Two variant mockups showing the price block with a £301 saving badge on the left and a 20% OFF badge on the right
2
Product Description Page

Surface 10-Year Guarantee Closer to Add to Basket

Problem
The 10-year guarantee is buried in the Guarantees accordion at the bottom of the left column. For a considered mattress purchase, durability is a key trust signal that should be visible at decision time.
Hypothesis
If we surface the 10-year guarantee near the Add to Basket button, users may be more likely to add the product to basket, due to reduced perceived purchase risk and improved trust at the moment of decision — key drivers of high-consideration conversions.
Proposed Treatment
MAB test 3 placements: (1) trust badge in the Klarna/Payl8r row, (2) added to the icon stack with delivery and trial, (3) consolidated trust strip above the CTA.
KPIs
Primary: Add to cart  ·  Secondary: Revenue
Desktop Mobile High priority Low effort
Proposed treatment — 3 placement variants
Three variant mockups showing the 10-year guarantee placed in the finance row, in the icon stack, and as a consolidated trust strip above the CTA
3
Product Description Page

Move the Sale Countdown Closer to Add to Basket

Problem
A secondary countdown is overlaid on the product image ("Sale ends in 10d 10h 42m"). It competes with the product image for attention and sits far from the Add to Basket button on the right.
Hypothesis
If we relocate the countdown to the right column, directly adjacent to the price and Add to Basket button, users may be more motivated to purchase now — urgency proximity at the moment of choice is a known driver of conversion on time-sensitive promotions.
Proposed Treatment
MAB test 3 placements: (1) horizontal pill above the CTA, (2) days/hours/minutes block above the CTA, (3) inline urgency bar below the CTA. Current in-image overlay is the control.
KPIs
Primary: Add to cart  ·  Secondary: Revenue
Desktop Mobile High priority Low effort
Proposed treatment — 3 countdown placements
Three variant mockups showing the sale countdown placed near the Add to Basket button: as a pill above the CTA, as a digit block above the CTA, and as an inline bar below the CTA
4
Product Description Page

Promote the Free Gift Bundle Above the Fold

Problem
The "Free Gift" badge sits next to the title, but the bundle contents and value aren't visible at the decision point. Many users may not realise what's included before committing.
Hypothesis
If we elevate the free gift bundle and quantify its value near the CTA (e.g., "Add to basket — includes £X of free gifts"), users may perceive higher overall value and be more motivated to add to basket, due to bundle-value salience at the moment of choice.
Proposed Treatment
MAB test 3 variations: (1) gift value integrated into CTA copy, (2) gift block moved above CTA, (3) sticky "free gifts" badge overlay on the product image.
KPIs
Primary: Add to cart  ·  Secondary: Revenue
Desktop Mobile Medium priority Medium effort
Proposed treatment — 3 visibility variants
Three variant mockups showing the free gift bundle integrated into the CTA, moved above the CTA, and as a sticky badge on the product image
5
Product Description Page

Optimise the Primary Add to Basket CTA

Problem
The current "Add to basket" CTA is functional but neutral. CTA copy is a high-leverage micro-decision area and a strong MAB candidate because winners surface quickly with many viable variants.
Hypothesis
If we test alternative CTA copy emphasising different motivators (action vs. risk-free trial vs. delivery), we can identify the phrasing that drives the highest add-to-basket rate, due to wording effects on motivation and friction at the point of purchase.
Proposed Treatment
MAB test 3 CTA variants: (1) "Buy now — free delivery", (2) "Start my 60-night trial", (3) "Get yours today — free gift included". Current "Add to basket" is the control.
KPIs
Primary: Add to cart  ·  Secondary: Revenue
Desktop Mobile Medium priority Low effort
Proposed treatment — 3 CTA copy variants
Three variant mockups showing alternative CTA copy: Buy now with free delivery, Start my 60-night trial, and Get yours today with free gift

Let's achieve goals together!

Ready to discuss the test roadmap, scope the implementation, or build the variants in VWO? Reach out and we'll set up a working session.

inna.lipova@scandiweb.com
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