Optimizing Review Submission

ABOUT

This project began with the improvement of the legacy system of the ‘Review Submission TF,’ which was newly established for the first time in 10 years. Due to an outdated environment, the review submission rate was stagnant at the 3% level, which meant that the business impact that could be created through UX improvement was significant.

I derived the complex entry paths and low visibility that customers experience during the review writing process as key pain points through data analysis. To solve this, I redesigned the journey in a direction that strengthens customer participation motivation by diversifying entry points at key locations and refining content.

As a result, by overachieving the KPIs for the daily average total number of reviews and quality reviews* by 154% and 127% respectively, I proved that UX optimization can be a powerful business growth driver even in a legacy environment.

*Quality Review: A reviews that include photos, surveys, or text

DURATION

2025, Q3

ROLE

Design Lead

TEAM

2 Product Designers

1 Product Manager

9 Engineers (Android/IOS)

1 UX Researcher

1 Data Analyst

Optimizing Review Submission

ABOUT

This project began with the improvement of the legacy system of the ‘Review Submission TF,’ which was newly established for the first time in 10 years. Due to an outdated environment, the review submission rate was stagnant at the 3% level, which meant that the business impact that could be created through UX improvement was significant.

I derived the complex entry paths and low visibility that customers experience during the review writing process as key pain points through data analysis. To solve this, I redesigned the journey in a direction that strengthens customer participation motivation by diversifying entry points at key locations and refining content.

As a result, by overachieving the KPIs for the daily average total number of reviews and quality reviews* by 154% and 127% respectively, I proved that UX optimization can be a powerful business growth driver even in a legacy environment.

*Quality Review: A reviews that include photos, surveys, or text

DURATION

2025, Q3

ROLE

Design Lead

TEAM

2 Product Designers

1 Product Manager

9 Engineers (Android/IOS)

1 UX Researcher

1 Data Analyst

Optimizing Review Submission

ABOUT

This project began with the improvement of the legacy system of the ‘Review Submission TF,’ which was newly established for the first time in 10 years. Due to an outdated environment, the review submission rate was stagnant at the 3% level, which meant that the business impact that could be created through UX improvement was significant.

I derived the complex entry paths and low visibility that customers experience during the review writing process as key pain points through data analysis. To solve this, I redesigned the journey in a direction that strengthens customer participation motivation by diversifying entry points at key locations and refining content.

As a result, by overachieving the KPIs for the daily average total number of reviews and quality reviews* by 154% and 127% respectively, I proved that UX optimization can be a powerful business growth driver even in a legacy environment.

*Quality Review: A reviews that include photos, surveys, or text

DURATION

2025, Q3

ROLE

Design Lead

TEAM

2 Product Designers

1 Product Manager

9 Engineers (Android/IOS)

1 UX Researcher

1 Data Analyst

What is Coupang?

As Korea’s No. 1 e-commerce platform with 33 million monthly users, Coupang holds unrivaled market share.
With 14 million daily visitors and 15 million paid members, it commands exceptional customer loyalty.
Redefining logistics with 'Rocket Delivery', it has evolved into an essential lifestyle app.

Review Submission Rate per Total Orders

22 H2

22 H2

7.63%

7.63%

2.80%

2.80%

3.79%

3.79%

25 H1

25 H1

24 H2

24 H2

24 H1

24 H1

23 H2

23 H2

23 H1

23 H1

Only 6% of buyers write reviews

Only 6% of buyers write reviews

Of these, Half write only one review per month

More than half of the products have no reviews

No review

No review

60%

60%

Review >=1

Review

>=1

Ratings only (76%)

Ratings only (76%)

Reviews with text or media (24%)

Reviews with text or media (24%)

40%

40%

What is preventing customers from writing reviews?

  • Non-reviewer: Customers who haven't written a review in the last 3 months (249)

  • Occasional reviewer: Customers who wrote a review in the last 7 days (Vine: 334, General: 279)

Reason

Reason

Non-reviewers

Non-reviewers

Occasional Reviewers

Occasional Reviewers

The review process is inconvenient

17.2%

10.2%

Just didn't feel like it

Just didn't feel like it

27.6%

17.0%

Lack of monetary incentives

25.0%

11.8%

Not selected for the trial group

7.8%

12.7%

Nothing to say about the product

6.9%

10.0%

Can't remember the product

2.6%

3.2%

Too many products pending for review

Too many products pending for review

10.3%

18.0%

A repurchase of a previously reviewed product

-

13.6%

Others

2.6%

3.4%

While there is a clear demand for incentives, we decided to prioritize lowering psychological friction

as a cost-effective first step for this quarter's initial phase.

While there is a clear demand for incentives, we decided to prioritize lowering psychological friction as a cost-effective first step for this quarter's initial phase.

While there is a clear demand for incentives, we decided to prioritize lowering psychological friction as a cost-effective first step for this quarter's initial phase.

MY Page

MY Page

'Reviews' is hidden in sub-menus

'Reviews' is hidden in sub-menus

One more tap to write another review

One more tap to write another review

Land on 'My Reviews' after submission

Land on 'My Reviews' after submission

Land on 'My Reviews' after submission

Minimal impact with persistent low engagement

Minimal impact with persistent low engagement

Nudging limited to products with zero review

Nudging limited to products with zero review

What We Aimed to Move

Our goal: Increase review submission rate by reducing psychological friction

Our goal: Increase review submission rate by reducing psychological friction

Increase Total # of

Daily “Quality” reviews

Increase Total # of

Daily “Quality” reviews

45K

45K

Current 31K

Current 31K

Increase Total # of

Daily First reviews

Increase Total # of

Daily First reviews

10K

10K

Current 6.5K

Current 6.5K

Increase Total # of

Daily reviews

Increase Total # of

Daily reviews

100K

100K

Current 72K

Current 72K

Overall participation volume to measure submission growth.

Overall participation volume to measure submission growth.

Ensures quantity growth does not compromise review quality

Ensures quantity growth does not compromise review quality

*Quality review: Review including text or image.

Tracks new product engagement driven by reduced entry barriers.

Tracks new product engagement driven by reduced entry barriers.

*First review: Review on low-review products (<10).

ENTRY ACCESSIBILITY

KEY FEATURE 01 New Review Widget in My Page

Before

Before

Hidden entry in full menu

Hidden entry in full menu

After

After

Direct-access review widget

Direct-access widget

Instant product rating via widget

Instant product rating via widget

Auto-submitted with optional detailed reviews

Auto-submitted with optional detailed reviews

User Flow for the Newly Added Widget

Entry Point Optimization

By migrating the review entry point from a hidden menu to a high-visibility home widget, we minimized user friction and achieved 178% of our daily review target.

Increase Total # Of
Daily Reviews

Increase Total # Of
Daily Reviews

178K

178K

178% of 100K Goal

Increase Total # Of Daily “Quality” Reviews

Increase Total # Of Daily “Quality” Reviews

66K

66K

147% of 45K Goal

Increase Total # Of Daily First Reviews

Increase Total # Of Daily First Reviews

711

711

7% of 10K Goal

SEAMLESS FLOW

KEY FEATURE 02 Nudge With Next Eligible Review After Submission

A/B Testing the landing page after review submission

Writing a review page

Writing a review page

Writing a review page

Before

Before

Variant A

Variant A

Variant B

Variant B

Before

Variant A

Variant B

Landing on 'My reviews' tab

Landing on 'My reviews' tab

Landing on 'My reviews' tab

Thank-You page with the next item to review

Thank-You page with the next item to review

Thank-You page with the next item to review

Thank-You page with three items for next reviews

Thank-You page with three items for next reviews

Thank-You page with three items for next reviews

Variant A emerged as the winner

Variant A emerged as the winner

Focusing on a single task outperformed showing multiple items.
Although aimed at total volume, it significantly improved the quality of reviews as well.

Focusing on a single task outperformed showing multiple items.
Although aimed at total volume, it significantly improved the quality of reviews as well.

Post-Submission Engagement

Optimizing the post-submission flow to focus on a single task significantly increased user focus.

This UX refinement led to a 147% achievement of the 'Quality Review' goal, outperforming the multi-item display approach.

Increase Total # Of
Daily Reviews

Increase Total # Of
Daily Reviews

34K

34K

34% of 100K Goal

Increase Total # Of Daily “Quality” Reviews

Increase Total # Of Daily “Quality” Reviews

20K

20K

45% of 45K Goal

Increase Total # Of Daily First Reviews

Increase Total # Of Daily First Reviews

135

135

1.3% of 10K Goal

UX REFINEMENT

KEY FEATURE 03 Improve First Review Nudge on Home

Before

Before

After

After

What are your primary motivations for writing product reviews?

What are your primary motivations for writing product reviews?

To help other customers

To help other customers

To help other customers

76.0%

76.0%

Focusing on the customer's altruistic desire to help others, I replaced the generic 'First Review' label
with messaging that emphasizes how their feedback would be highly helpful to fellow shoppers.

Focusing on the customer's altruistic desire to help others, I replaced the generic 'First Review' label with messaging that emphasizes how their feedback would be highly helpful to fellow shoppers.

Before

Before

After

After

Unlike the previous flow that required clicking 'Complete,'
star ratings are now registered automatically.

Unlike the previous flow that required clicking 'Complete,'
star ratings are now registered automatically.

Psychological Nudge Contents

Focusing on the fact that 76% of users write reviews to help others, I refined the messaging to emphasize the value of their contribution.

By streamlining the flow with an auto-submit feature, this small UX adjustment successfully drove daily 'First Reviews' to 1.4k.

Increase Total # Of
Daily Reviews

Increase Total # Of
Daily Reviews

4.3K

4.3K

4% of 100K Goal

Increase Total # Of Daily “Quality” Reviews

Increase Total # Of Daily “Quality” Reviews

2.3K

2.3K

4% of 45K Goal

Increase Total # Of Daily First Reviews

Increase Total # Of Daily First Reviews

1.4K

1.4K

14% of 10K Goal

Review submission rate turns upward

Addressing pain points led to a sharp rebound in review rates.
UX improvements by the dedicated team drove a 1.8%p increase, proving a clear upward trend.

The entire process of recurring delivery

Review Submission Rate per Total Orders

Review Submission Rate per Total Orders

Review Team formed

Review Team formed

24 Q3

24 Q3

5.68%

5.68%

2.80%

2.80%

3.86%

3.86%

24 Q4

24 Q4

25 Q1

25 Q1

25 Q2

25 Q2

25 Q3

25 Q3

2025 Q3 Performance Results

Key Results

Weight

Goal

Current Status

Current Status

Score

Increase total # of daily reviews

0.5

100,000

253,820

254%

Increase total # of daily Quality reviews

0.25

45,000

102,070

102,070

227%

227%

Increase total # of daily First reviews

0.25

10,000

2,428

2,428

24%

24%

1

Exceptional Overachievement (254% & 227%)

Confirmed the effectiveness of the strategy in driving reviews by reducing psychological friction for customers.

2

Insight from Performance Gap (24%)

'First Reviews' (on products with <10 reviews) fell short of the target.

3

Strategic Focus for Next Quarter: Focus on getting First review

Building on this gap, we will prioritize features to activate 'First Reviews' for low-review products next quarter.