Platform research · Salesforce - Shopping Index UK Cyber Week 2025
Cross-Device Commerce 2025: 70% of Online Orders on Mobile
Salesforce's 2025 Cyber Week analysis, published on 11 December 2025, found that mobile devices drove 70% of global online orders during the seven-day peak window and UK shoppers spent over £6 billion across the same period (a 3% rise on 2024). The Shopping Index sits on aggregated activity from over 1.5 billion shoppers across 89 countries and confirms that cross-device commerce is now mobile-led, with phones owning both the browsing and checkout layers that desktop dominated a decade ago when Criteo's discontinued cross-device reports first set the benchmark.
Source published Summarised
Read the full report from Salesforce - Shopping Index UK Cyber Week 2025
Key findings at a glance
- 70% Share of global online orders placed on mobile devices during Cyber Week 2025 (25 November to 1 December), per Salesforce Shopping Index aggregated retailer data.
- 27% Share of global Cyber Week orders paid through a mobile wallet such as Apple Pay or Google Pay, with mobile wallets now the fastest-growing payment surface across the index.
- £6 billion Total UK shopper spend during the 2025 Cyber Week window, a 3% rise year on year and a record for the UK market.
- £256 billion Global Cyber Week sales total ($336.6 billion), a 7% rise year on year despite an average selling price (ASP) increase of 6%.
- 20% Share of global Cyber Week orders that Salesforce attributes to AI or agentic influence, via personalised recommendations and conversational service tools.
- 15% Share of global digital traffic to retailer sites that came from social media platforms during Cyber Week 2025.
- 55% Year-on-year growth in TikTok-originated shopping traffic, with TikTok now accounting for 9% of global social-driven traffic during Cyber Week.
- 1% Drop in UK Cyber Week order volumes year on year, against a 2% global rise. UK spend still grew because basket value rose faster than basket count.
What the report covers
Salesforce published its 2025 UK Cyber Week recap on 11 December 2025, reporting on the seven-day window from Black Friday (25 November) through Cyber Monday (1 December). The dataset draws on more than 1.5 billion global shoppers and 1.5 trillion page views, with UK results broken out separately as one of 18 key markets the Shopping Index tracks. UK shoppers drove over £6 billion in sales across the week, a 3% rise year on year, while global Cyber Week sales rose 7% to over £256 billion ($336.6 billion). For UK ecommerce operators, the headline is that 2025 was a record peak window despite price sensitivity and a slight dip in UK order volumes.
The single most important finding for anyone planning a digital storefront, ad funnel or checkout flow is the device split. Mobile devices accounted for 70% of online orders globally during Cyber Week, and mobile wallets handled 27% of all orders by payment method. This is the data the broken Criteo cross-device citations used to anchor before Criteo discontinued its public State of Cross-device Commerce series in 2017. Salesforce's quarterly Shopping Index has effectively stepped into that role, with the advantage of running on continuous first-party retailer data rather than periodic survey snapshots. The longer trend matches the consumer reality: mobile commerce has moved from "second screen" experiment to the default purchase surface across most consumer categories.
The UK number worth pausing on is the volume drop. While global Cyber Week order volumes grew 2% year on year, UK volumes dropped 1%. Spend still rose because the average selling price climbed 6% globally, so UK consumers bought slightly less but paid more per order. That mirrors the pattern in the wider ONS Retail Sales Index internet sales series, which shows UK online retail share holding around 28% of total retail through early 2026 with value (not volume) doing the heavy lifting in growth. UK ecommerce sites in 2025 are winning on basket value rather than basket count, and they are doing it through a mobile-first surface.
What this means for UK marketers
Cross-device commerce in 2025 is no longer a "mobile is rising" story. It is a mobile-default story, with desktop now a secondary research and high-consideration surface. For UK ecommerce teams planning peak windows, three implications matter, and they should change where the conversion-rate budget goes in 2026.
First, the mobile experience is the conversion rate. If 70% of orders are placed on a phone and 27% are settled with a mobile wallet, then mobile page speed, mobile checkout friction and Apple Pay / Google Pay coverage are the highest-leverage CRO levers any UK retailer has. A 3% desktop conversion lift is worth a fraction of what shaving one second off a mobile checkout delivers. Teams investing in mobile-first ecommerce build patterns (single-thumb navigation, autofilled checkout, persistent cart, wallet-first payment ordering) will capture the spend that is already happening on the dominant device. Anyone still running a "desktop primary, mobile responsive afterthought" template is leaving Cyber Week revenue on the table.
Second, the channel mix has shifted upstream. Social media drove 15% of all global digital traffic to retailer sites during Cyber Week, with TikTok alone responsible for 9% of global social traffic and growing 55% year on year. For UK retailers, TikTok organic and TikTok Ads are no longer optional during peak windows. The population-level baseline is consistent: see our companion UK mobile online time report for Ofcom's finding that 77% of UK adult online time is on smartphones. Combining a vertical-video upper funnel with a wallet-first mobile checkout closes the loop between the device people are browsing on and the device they are converting on. Splitting the two (desktop creative, mobile checkout) is the most common waste pattern we see in UK paid media accounts in 2026.
Third, the UK volume drop alongside rising spend is worth attention. UK consumers spent more per basket but bought less, which suggests price sensitivity is biting. The strongest performers this peak window will be retailers who lead on value (bundles, free delivery thresholds, finance options, transparent comparison) rather than percentage-off discount theatre, because ASP rose 6% across Cyber Week and shoppers know it. AI-influenced personalisation (which Salesforce attributes 20% of global Cyber Week orders to) is a margin lever in this environment because it raises basket value through cross-sell and recommendation rather than dropping price. UK SMBs that pair mobile-friendly checkout with credible value messaging and intelligent on-site personalisation will outperform those still optimising desktop product pages for shoppers who are no longer there.
How they got the data
The Salesforce Shopping Index aggregates first-party transaction and traffic data from retailers running on Salesforce's Agentforce 360 platform, including Agentforce Commerce, Agentforce Marketing and Agentforce Service. The 2025 holiday dataset draws on the activity of more than 1.5 billion shoppers across 1.5 trillion page views, with the index spanning 89 countries and focused reporting on 18 key markets: the United States, Canada, United Kingdom, Germany, France, Italy, Spain, Japan, the Netherlands, Australia, New Zealand, the wider Asia-Pacific region, Switzerland, Latin America, the Middle East and Africa, Eastern Europe, Belgium, and the Nordics. The index blends in third-party data and applied extrapolation factors to produce industry-level estimates, with Salesforce noting that figures are not indicative of Salesforce's own commercial performance.
The Cyber Week dataset specifically covers the seven days from 25 November to 1 December 2025. Salesforce published the UK results on 11 December 2025, with separate global, regional and US-focused press releases issued earlier the same month. Because the Shopping Index is updated quarterly, the underlying benchmarks span the prior nine quarters, which is what makes the device-mix and channel-mix numbers comparable year on year rather than point-in-time snapshots. The methodology is documented at the foot of each Salesforce holiday release for reference.
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From Salesforce - Shopping Index UK Cyber Week 2025 · published 11/12/2025