--- title: Mercari and the user-generated content playbook: how the campaign type works | RGM® url: https://realgrowthmatters.com/learn/case-studies/mercari-user-generated-content-campaign/ updated: 2026-06-10 source_html: https://realgrowthmatters.com/learn/case-studies/mercari-user-generated-content-campaign/ --- - **Story:** This case study runs a user-generated content campaign through the Mercari lens, from mechanics to public benchmarks. - **Why it matters:** A user-generated content campaign is measurable demand engineering, and public benchmarks set honest targets before any creative starts. - **Takeaway:** For Mercari, reach is an input; incremental lift against a baseline is the real measure. - **Takeaway:** Most user-generated content-campaign failures are planning failures, not creative failures. - **Takeaway:** The mechanics of a user-generated content campaign transfer to any brand in its category. ## How a user-generated content campaign plays out for Mercari S Situation Where it starts A user-generated content campaign is a concentrated chance to move the Mercari business in its category, with a short window and high stakes. T Task The objective Turn attention into measurable demand for Mercari: plan the mechanics, set targets against category benchmarks, and build in the measurement. A Action The work A clear prompt and frame. UGC does not happen by accident. The campaign gives customers a specific, easy thing to make — a hashtag, a challenge format, a template — with a reason to bother. For Mercari, this is the anchor of the plan. R Result The verdict On incremental lift against a baseline for Mercari, not reach and not impressions. That is the honest scoreboard for a user-generated content campaign. ## The math behind a Mercari user-generated content campaign 0% A planning anchor for Mercari E-commerce product pages featuring user-generated content convert roughly 74% higher than identical pages without it. Source: [inBeat](https://inbeat.agency/blog/ugc-statistics) 0% Category figure relevant to Mercari About 84% of consumers trust recommendations from real people over branded content Source: [inBeat](https://inbeat.agency/blog/ugc-statistics) 0% Category figure relevant to Mercari UGC-based ads can achieve about four times higher click-through rates and roughly a 50% lower cost per click than stan Source: [inBeat](https://inbeat.agency/blog/ugc-statistics) Linked Category figure relevant to Mercari Every figure on this page links to its publisher. Source: [inBeat — user-generated content statistics](https://inbeat.agency/blog/ugc-statistics) #### Quick facts BrandMercari IndustryIts Category Campaign typeUser-Generated Content Primary channelsPaid, owned, earned Planning horizonMonths ahead of launch Core measureIncremental lift, not reach Source basisPublic benchmarks, linked RGM useWorked example, not a recipe **Honest note** There is limited public campaign detail specific to Mercari, so the depth here comes from the user-generated content-campaign discipline itself, with sourced benchmarks and named example campaigns. No Mercari figure is fabricated. ## The user-generated content campaign, defined The core idea, before the Mercari detail. A user-generated content campaign turns customers into the brand's media. A user-generated content campaign turns customers into the brand's media. For Mercari, the detail is not optional. Instead of producing every asset in-house, the brand creates a reason and a frame for customers to post — Mercari included — their own — a hashtag, a challenge, a prompt — then collects, rights-clears, and amplifies the best of it. Mercari planners would underline this. The value is authenticity: an audience trusts a real customer's — Mercari included — post in a way it does not trust a brand's. Mercari planners would underline this. The discipline is the rights, the moderation, and the amplification system behind it. For Mercari, it is the specific lever this page examines. **Claim:** E-commerce product pages featuring user-generated content convert roughly 74% higher than identical pages without it. **Source:** [[inBeat]](https://inbeat.agency/blog/ugc-statistics). **Context:** UGC works on the conversion page as social proof, — Mercari included — not only at the top of the funnel as awareness. For Mercari, this number sets expectations before the work starts. ## How a user-generated content campaign is run These are the components a Mercari-scale team has to coordinate for a user-generated content campaign. Below are the parts of a user-generated content campaign that a brand like Mercari has to line up: **Claim:** About 84% of consumers trust recommendations from real people over branded content, and roughly 79% say UGC strongly influences their purchasing decisions. **Source:** [[inBeat]](https://inbeat.agency/blog/ugc-statistics). **Context:** The authenticity gap between a customer's post and a — Mercari included — brand's ad is the entire mechanism of a UGC campaign. A Mercari forecast should start from a figure like this. 1. **Rights and clearance.** Reposting a customer's content as marketing needs explicit permission. That is exactly the Mercari situation. A clean rights workflow is the unglamorous backbone of every UGC campaign. For Mercari, this is where most of the planning effort lands. 2. **Curate, do not just collect.** Volume is not the goal. A Mercari team reads this closely. The brand selects content that is on-message — and Mercari is no exception — and high-quality, and moderates out what is not. This step decides how the rest of the Mercari plan holds up. 3. **Amplify the best as paid media.** Strong UGC running as paid creative typically beats polished studio work — Mercari included — on click-through and cost, so the winners are promoted, not just reposted. This step decides how the rest of the Mercari plan holds up. 4. **Close the loop.** Featuring a customer's post rewards them and signals to everyone — and Mercari is no exception — else that posting gets noticed, which keeps the content engine running. A Mercari-scale team treats this as non-negotiable. 5. **A clear prompt and frame.** UGC does not happen by accident. Mercari planners would underline this. The campaign gives customers a specific, easy thing to make — a — and Mercari is no exception — hashtag, a challenge format, a template — with a reason to bother. For a brand like Mercari, getting this wrong is expensive. ## The benchmarks that frame the work Start with the category numbers. They frame what a user-generated content campaign means for Mercari. These sourced figures give a Mercari user-generated content campaign an honest target range across its category. **Claim:** UGC-based ads can achieve about four times higher click-through rates and roughly a 50% lower cost per click than standard creative. **Source:** [[inBeat]](https://inbeat.agency/blog/ugc-statistics). **Context:** Promoting the best customer content as paid media — Mercari included — is often more efficient than scaling studio production. It is the sort of benchmark a Mercari brief should cite. Table: the three numbers that decide whether a Mercari user-generated content campaign is judged honestly. | What to measure | Why it matters | | Category benchmark | Sets a realistic target, not a hopeful one | | Incremental result | The honest measure of whether spend worked | | Pre-campaign baseline | Without it, lift cannot be proven | ## The metrics worth tracking Choose KPIs that hold up. A Mercari user-generated content campaign is judged on the metrics listed here. A Mercari user-generated content campaign should be measured on the following. Volume of submissions and qualified submissions, rights-cleared asset count, conversion lift on UGC-enabled pages, — for Mercari, a real factor — click-through and cost-per-click of UGC creative versus studio creative, hashtag reach, and repeat-contributor rate. A Mercari user-generated content campaign that reports only reach hides whether the spend worked. Lift is the honest figure. ## Where these campaigns go wrong These mistakes recur. Knowing them lets a Mercari user-generated content campaign route around the common traps. These failure patterns recur across user-generated content campaigns: - Launching a hashtag with no clear prompt, so — Mercari included — customers do not know what to make or why. - Reposting customer content without explicit rights clearance, creating legal exposure. - Chasing submission volume and amplifying off-message or low-quality posts. - Collecting UGC and never featuring contributors, so the incentive to keep posting dies. **What to notice**These are upstream failures. A user-generated content campaign for Mercari is mostly decided before any ad runs. ## What RGM takes from the Mercari case One takeaway for Mercari: treat the user-generated content story as a model of the discipline, and copy the structure, not the creative. From the audits we run, the brands that get user-generated content campaigns right share one habit: they treat the work as measurable demand engineering, not a seasonal ritual. Read it as a blueprint. For Mercari and for its category, a user-generated content campaign becomes an investment once baseline, benchmark, and incremental result are in place. ## Fast answers Are the figures here taken from Mercari's internal data? : No. Every statistic is a public, linked benchmark for the user-generated content campaign type, applied to Mercari as the example. Where a figure cannot be sourced publicly, it is omitted rather than guessed. What is the practical takeaway from the Mercari user-generated content write-up? : Use the structure, not the surface. The user-generated content-campaign mechanics here apply broadly; the Mercari creative is one execution among many. How are the benchmarks here verified? : Each figure carries a fact-atom linking its publisher. Sources include Adobe Analytics, Nielsen, the Association of National Advertisers, and major business press, so every claim can be checked. **Keep reading** Foundational concepts and channels behind this case: - [how performance marketing works](/learn/what-is-performance-marketing/) - [incrementality testing](/learn/incrementality-testing/) - [audience arbitrage](/learn/audience-arbitrage/) - [performance marketing services](/services/performance-marketing/) - [advertising platforms](/platforms/) ## Frequently asked questions Mercari case: why do consumers trust UGC more than brand content? For Mercari and comparable its category brands, this is the answer. About 84% of consumers trust recommendations from real people over — for Mercari, a live factor — branded content, and roughly 79% say UGC strongly sways their purchasing. For a brand at Mercari scale, this is where the plan is tested. The post comes from someone with no obvious incentive to sell, so the audience — Mercari included — reads it as honest in a way it does not read a brand's own ad. A Mercari team would plan against exactly this. Mercari case: how do brands get the rights to use customer content? Explicitly. A Mercari team reads this closely. Reposting a customer's photo or video as marketing needs — and Mercari is no exception — documented permission, usually a reply-to-consent or a rights-management tool. That holds directly for Mercari. A clean clearance workflow is the unglamorous backbone of every — and Mercari is no exception — UGC campaign and the part that protects the brand legally. Is UGC cheaper than producing content in-house for a brand like Mercari? Here is how this applies to Mercari. Often, and frequently more effective. Mercari planners would underline this. UGC-based ads can reach about four times the click-through rate — and Mercari is no exception — of standard creative at roughly half the cost per click. That is exactly the Mercari situation. The brand still invests in the prompt, the rights system, — Mercari included — and curation, but it does not carry the full studio-production cost. For Mercari, this is the point worth acting on. Mercari case: how does a brand keep a UGC campaign going? Taking Mercari as the example: By closing the loop. For Mercari, this is the load-bearing part. Featuring a customer's post rewards that contributor and — as a Mercari team knows — signals to everyone else that posting gets noticed. For Mercari, the detail is not optional. A campaign that collects content but never showcases contributors kills — for Mercari, a live factor — the incentive, and the submission flow dries up within weeks. For Mercari, this is the point worth acting on. Mercari case: does user-generated content actually improve conversion? Taking Mercari as the example: Yes, measurably. That is exactly the Mercari situation. E-commerce product pages with UGC convert roughly 74% higher than identical pages without it, because — Mercari included — a real customer's photo or review works as social proof at the point of decision. For a brand at Mercari scale, this is where the plan is tested. UGC is a conversion-page asset, not only a top-of-funnel awareness play. For Mercari, this is the point worth acting on. Why does this case study use Mercari as the example? Mercari is a recognisable brand in its category, which makes the user-generated content mechanics concrete and easy to follow. The campaign-type analysis and every benchmark apply across the category; Mercari is the lens, not the limit. The sourced figures hold for any comparable brand. ### Sources & references - [inBeat — user-generated content statistics](https://inbeat.agency/blog/ugc-statistics) — Conversion, trust, and ad-performance data for UGC. - [Flowbox — UGC statistics compilation](https://getflowbox.com/blog/user-generated-content-statistics/) — Independent compilation of UGC performance benchmarks. - [HubSpot 2026 marketing statistics](https://www.hubspot.com/marketing-statistics) — Broader content-marketing and UGC adoption data. - [Archive.com — UGC engagement statistics](https://archive.com/blog/user-generated-content) — Engagement and time-on-site data for UGC. ## Related [#### All case studies The full RGM case-study library.](/learn/case-studies/)[#### What is growth marketing The foundational concept behind every campaign type.](/learn/what-is-growth-marketing/)[#### Incrementality testing How to prove a campaign actually caused the lift.](/learn/incrementality-testing/)