Varying sized opportunities for the product compare tool that increased engagement YoY.

  • Which? Compare
    • Product Design
  • Retention
  • 2024

Summary

Leaky bucket retention problem → We did some useful things → This increased engagement with the compare tool 38% YoY → Good outcomes for both users and the business

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Compare journey on mobile web | L-R: Adding products to the compare tray on a listing page, compare page showing a side to side comparison of 2 products, and switching between products on the compare page

Problem

With a leaky bucket issue within the subscription side of the business, our squad was tasked with how we could better retain members. A fundamental step in the research and buying journey is the ability to compare products at a glance. At the time, we weren't doing a good enough job in this area for members.

As a squad, we identified 'compare' as a big opportunity to focus on where we could improve journeys for users and increase member engagement.

Air fryer 'best' page with compare tray open with a number of products added to compare
An article page showing an advice product card and 4 products added to the compare tray

Research

We already knew a lot about of the research and buying journey process through previous research but we didn’t know how our current compare journey was performing for users apart from our own assumptions and frustrations with the experience.

As a squad, we undertook 2 rounds of research to uncover insights and pain points by showing our current experience and new designs in front of participants on UserTesting.

This included a new mobile concept for the compare journey which we decided was a no-brainer to test as an opportunity because for whatever reason, the compare tool was never available to over 50% of our users.

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The product research and buying journey with the areas highlighted that we could control for users within the Which? reviews experience

Opportunities

Using the insights from the research, we came together as a squad to come up with ideas on how we could tackle the more pressing areas of concern for users.

We then further validated these ideas through A/B test experiments and where necessary, evaluative research. We were continuously learning through research and experiments using both qualitative and quantitive data points to ensure that any new designs were meeting both user needs and increasing engagement metrics respectively.

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A/B test experiment where we reduced the size of the mobile product cards on listing pages that allow users to compare earlier in their research and buying journey — a key insight we discovered from user research

Big and small bets

We rolled out a number of initiatives confident that they would impact engagement metrics positively. There's uncertainty of how the changes will perform once everything is shipped. We can hope for an accumulation effect but the data may say otherwise and leave us with more questions than answers.

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Compare functionality on the saved page for shortlisting products

Impact

As a result of everything we shipped, we saw YoY increases of 38% and 23% in compare engagement and affiliate clicks respectively. The YoY increase in engagement was a big surprise for us. It was incredibly rewarding after everything we did as a squad—contributing positively to both retention and revenue.

The compare journey and page was untouched for many years. I was part of the reviews rewrite project in 2022 where we updated the look of the page using design system components. How users interacted with the page stayed the same.

In 2024, the action of comparing products became a high-value action within the business because the research and data showed how important this stage of the research and buying journey was to users.

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Timeline of the impact of all of the work completed on compare across 8 months

Reflections

The biggest challenge we had as a design and research team was pushing for this type of work that improves key journeys for our members. It took a long time to convince product and stakeholders that this would be worthwhile to focus on. It never became a priority until retention became a problem.

We managed to tell a story of how essential it is to understand the research and buying journey, further validate our ideas, and release things that benefit both our users and business goals.

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L-R: Accordions reduce the initial height on mobile and show all sections at a glance, new pros and cons section, and revamped star ratings on the compare page

The end

As a thank you for scrolling this deep, here's everything we improved on the compare page using evaluative insights.

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Pros & cons were added to the compare page because it was already on the app and there was an appetite for it. It also eliminates the need to go to the product page.
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'Expert review' section where users can read Which?'s verdict on each product, eliminating the need to go back and forth to check the most important piece of the review
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Previously ★★★☆☆ and hard to scan for users, we revamped the star ratings and these were well received in moderated testing
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'Where to buy' section where users can see a full list of prices and retailers to compare from and this also gives us an affiliate revenue opportunity if the user is ready to buy