Amazon's Q3 2025 results, released on 30 October, delivered a strong set of numbers across the board. Total revenue reached $180.2bn, up 12% year-on-year, beating analyst expectations. AWS grew 20% to $33bn, its fastest rate since 2022. But for brands and advertisers, the headline that matters most is the continued acceleration of Amazon's advertising business.

Advertising revenue reached $17.7bn in Q3, growing 22% year-on-year. Crucially, this marked the third consecutive quarter of accelerating growth. That trajectory is not an anomaly; it is a structural shift in how brands are choosing to spend.

The advertising number and what it signals

$17.7bn in a single quarter from advertising alone is a striking figure. To put it in context, that is more than the entire annual advertising revenue of many of the world's largest media companies, generated in just three months.

The growth is being driven by a combination of factors that are directly relevant to how brands approach Amazon today. Amazon's DSP strategy is expanding access to premium inventory through partnerships with Netflix, Spotify, Roku and SiriusXM, collectively reaching hundreds of millions of ad-supported users. Prime Video advertising commitments for 2025 and 2026 are reported to have exceeded forecasts, driven significantly by live sports content. Amazon Marketing Cloud enhancements are boosting adoption among global brands by improving the quality and accessibility of measurement. And AI-powered creative tools are meaningfully reducing the time and cost of campaign development.

These are not peripheral developments. They are the infrastructure investments that make Amazon advertising more effective, and the Q3 revenue growth reflects brands responding to that improved capability with increased investment.

Three consecutive quarters of acceleration

The acceleration point deserves emphasis. Revenue growth accelerating across three successive quarters tells a different story to a one-quarter spike. It indicates that brands which are already investing are continuing to increase that investment, and that new advertisers are entering the platform at a meaningful rate.

The underlying reason is straightforward: Amazon is where high-intent consumers begin their shopping journey. When a shopper arrives on Amazon, they are frequently already in buying mode. That quality of audience intent is exceptionally difficult to replicate elsewhere, and it is what drives the return on advertising spend that keeps budgets flowing toward the platform.

Why this matters for UK brands

Amazon's advertising performance is reported globally, and the figures are dominated by the United States. It would be easy for UK brands to view these results as a distant American story. They are not.

The infrastructure investments driving global advertising growth - DSP expansion, Prime Video, improved measurement, AI-powered tools - are the same capabilities available to UK advertisers. The partnerships with Netflix and Spotify that are extending programmatic reach in the US are live in the UK. The Amazon Marketing Cloud improvements are accessible to UK brands running campaigns through agencies like Vector. The opportunity described by Q3's results is not geographically limited.

If anything, the UK market is at an earlier stage in its adoption of these capabilities, which means the opportunity for brands that move quickly is proportionally larger.

How we are translating this into UK client performance

At Vector, the Q3 results reinforce three areas of focus we are applying for our UK clients heading into Q4.

Smarter budget allocation. Moving beyond Sponsored Products alone to strategically deploy Amazon DSP opens access to higher-margin campaigns, more sophisticated audience targeting, and the kind of reach extension through Netflix and Spotify that the Q3 results confirm is driving growth globally. For brands still treating DSP as an add-on rather than a core channel, Q3's results are a prompt to reconsider.

Optimising for profitability. Strong advertising revenue growth means increasing competition for the most valuable placements. In that environment, managing ACOS with precision becomes more important, not less. We focus on ensuring that every pound of advertising spend contributes directly to bottom-line profit, rather than chasing visibility metrics that do not connect to commercial outcomes.

Maximising Q4 performance. Amazon's management noted no significant concerns about tariffs or holiday demand heading into Q4 — a signal of quiet confidence in the peak trading period. We are using Q3 performance data to build campaign structures that are specifically calibrated for Christmas and Boxing Day trading, the periods where the combination of elevated intent and competitive ad inventory makes precise planning most valuable.

The Q3 results confirm that Amazon's advertising ecosystem is growing in scale, sophistication and strategic importance. The brands that treat this as validation of their existing approach will capture their share of that growth. The brands that use it as a prompt to go further will capture more.

Want to understand how to translate Amazon's global advertising momentum into local growth for your brand? Get in touch with the Vector Retail Media team.