UGC and influence: why content actually sells on marketplaces

When two areas of expertise complement each other

Marketplaces have established themselves as sales channels in their own right, where competition is no longer only about price or availability, but about the ability of brands to emerge inside saturated catalogues.

Everything on these platforms converges towards the same moment: the one where a product visit turns into a purchase. That is where the value concentrates, and that is also where everything gets complicated. Because that tipping point depends on two very different things: bringing the right customer in front of the right product, and removing their last doubts at the moment of clicking.

The first is a matter of algorithms and data: visibility, ranking, advertising, price, Buy Box. The second largely escapes the dashboards: brand perception, proof of use, credible recommendation. Two areas of expertise, then, but a single cursor to move: the conversion rate.

That is precisely what the coming together of eTAIL agency, which steers marketplace performance with a strong business discipline, and blue2purple, which structures content, UGC and influence as real conversion factors, makes possible. One works on what the algorithms measure, the other on what they do not capture.

Marketplaces: a sales channel that has become ultra competitive

Marketplaces give direct access to high purchase intent, but they also impose an extremely standardised framework. Brands operate in environments where algorithmic arbitrage is permanent and where every marginal optimisation becomes decisive.

Data is therefore indispensable to frame the whole thing: it makes it possible to adjust investments, prioritise actions and optimise profitability. But when every player relies on the same foundations and the same indicators, the battle moves elsewhere. The crucial question becomes how to stand out in an environment where the products are often comparable.

eTAIL agency: steering marketplace performance methodically

eTAIL agency works on Amazon and the marketplaces with a resolutely operational approach focused on profitability. With more than 10 years of expertise, more than 500 marketplace projects delivered and reference certifications (Amazon Advertising Advanced Partner in particular), the agency structures its work around four areas of expertise:

Strategy, consulting and training. Strategic studies ahead of the marketplace launch to validate the technical organisation and the business opportunities: market research, building the P&L, 1P versus 3P arbitrage, catalogue audit. The experts also run training for internal teams.

Marketplace management. Support across the whole value chain: product catalogue structuring, BtoC logistics, customer service, invoicing and marketing campaign steering.

Amazon Vendor and Seller management. Dedicated management of the Vendor, Seller and hybrid models (1P and 3P): commercial negotiations with Amazon, catalogue audit and product unblocking, management of penalties and disputes, content creation (A+, Brand Store, Brand Story, infographics, video), opening sales across Europe (PanEU), reporting and indicator tracking (Buy Box, acceptance rate, reviews, net PPM).

Advertising performance. Steering Amazon Sponsored Products and Sponsored Brands advertising strategies, but also using Amazon as a media platform through the DSP (Display, Prime, Twitch) and Amazon Marketing Cloud to build audiences and analyse results.

Thanks to this approach, brands steer their marketplaces as a major commercial channel, optimised through clear arbitrage and rigorous results tracking.

The limits of an approach built on data alone

Despite that sophistication, many brands observe a form of stagnation. The indicators are optimised, the campaigns adjusted continuously, but the gains become marginal.

That ceiling is not down to a lack of data, but to the blind spot in what is measured. When every player optimises the same variables, the difference is made elsewhere: in the buyer's head, one minute before the click. And no dashboard can capture that part.

blue2purple: putting social proof back into the conversion mechanics

That is exactly where we come in. Where a product page describes, embodied content demonstrates; where a campaign pushes a message, a genuinely credible recommendation gets it accepted.

For us, UGC and influence go beyond a simple question of image: they are sales accelerators anchored in the act of buying:

• product demonstrations anchored in real usage, showing the product in a real situation rather than in a studio,
• embodied experience feedback and reviews, carried by voices the consumer identifies with,
• staged use cases that let the buyer picture themselves before they even order,
• credible recommendations carried by identified creators, whose audience recognises their legitimacy.

The strength of this approach lies in how it is structured. This content is not designed in isolation, it is aligned with the e-commerce stakes: it answers the concrete objections that hold back a purchase on marketplaces, doubt about quality, uncertainty about usage, the lack of reassurance in front of an oversupplied offer.

The result: conversion goes up in a healthy way, without budget overheating. Data optimises the cost of acquisition, content creates the propensity to buy. Two forces that add up instead of cannibalising each other.