4Aug 2026

Ecommerce PPC agency for UK stores: what to expect

Hands adjusting ecommerce PPC campaign flowcharts

Hire an ecommerce PPC agency when you need sustained, measurable growth in online sales, not just more clicks. The right partner will audit your current accounts, fix your product feed, and deliver a clear ROAS target within a defined timeline. Before you sign anything, confirm three things: you will own your ad accounts outright, you will see profit-based reporting (ROAS and customer acquisition cost, not just impressions), and you will have a written timeline to measurable results.

Expect a full account audit within the first one to two weeks, covering feed quality, campaign structure, conversion tracking, and Google Analytics 4 setup.
Expect measurable ROAS typically within 8–12 weeks of campaign launch, once feed fixes and initial testing are complete.
Retain full account ownership from day one. Never sign with an agency that holds your data in its own master accounts.

Ready to get started? Book a free audit with Brainiacmedia and get a clear picture of where your paid spend stands today.

What does a full-service ecommerce PPC agency actually manage?
How does an ecommerce PPC agency onboard and optimise your campaigns?
How do ecommerce PPC agencies charge, and what should you budget?
How do you vet and choose the right ecommerce PPC agency?
Proof, credentials, and UK regulatory context you need to know
Key takeaways
Why most ecommerce stores underestimate what a PPC agency should deliver
Brainiacmedia’s ecommerce PPC and digital growth services
Useful sources and official documentation

What does a full-service ecommerce PPC agency actually manage?

Paid search for online stores spans far more than a Google Ads account. A capable agency manages the full channel mix and the technical infrastructure that makes each channel perform.

Core paid channels

Google Shopping and Search: — Product Listing Ads, Shopping campaigns, and Performance Max (PMax) campaigns are the engine of most UK ecommerce PPC strategies. PMax in particular requires careful product feed management and audience signal inputs to avoid wasted spend.
Meta Ads (Facebook and Instagram): Prospecting and retargeting via dynamic product ads, with creative testing across static, carousel, and video formats. Brainiacmedia’s paid social work covers both platforms.

Service areas beyond campaign management

Technical campaign maintenance is increasingly commoditised. What separates a strong agency is CRO integration and behavioural strategy, which drive sustainable ROI once the basic campaigns are live.

CRO and landing-page work: — When UK Google Search CPCs rose 45% between 2024 and 2025, the marginal gain shifted from buying more clicks to converting the ones you already have.

Supported ecommerce platforms

Shopify is the most common platform in UK ecommerce and has native Google and Meta integrations, though feed quality still needs manual oversight. WooCommerce and Magento require more technical setup for Shopping feeds, typically via a third-party feed tool such as DataFeedWatch or Feedonomics. The agency you choose should have documented experience with your specific platform stack.

How does an ecommerce PPC agency onboard and optimise your campaigns?

Understanding the process before you start saves weeks of confusion and sets realistic expectations on both sides.

Onboarding checklist: what you need to provide

Admin access to your Google Ads, Microsoft Advertising, and Meta Business Manager accounts
Access to your product catalogue and existing feed (Google Merchant Center, Meta Commerce Manager)
GA4 property access with ecommerce tracking confirmed
Historical performance data (at least 90 days where available)
CRM or ecommerce platform access (Shopify admin, WooCommerce backend) for feed and conversion data
Your top SKUs by margin and revenue, and any products you want to exclude from paid activity

Typical engagement timeline

Weeks 1–2: Audit. The agency reviews account structure, feed quality, conversion tracking, and historical ROAS. You receive a written findings report.
Weeks 2–4: Feed fixes and technical setup. Product titles, attributes, and GTINs are corrected. GA4 enhanced ecommerce events are verified. Merchant Center issues are resolved.
Weeks 4–6: Campaign build. Shopping, Search, and PMax campaigns are structured. Audience lists, remarketing tags, and negative keyword lists are built.
Weeks 6–12: Testing and optimisation. Bid strategies, asset groups, and audience signals are tested. The agency runs a bi-weekly or monthly optimisation cadence, with reporting tied to ROAS and customer acquisition cost rather than vanity metrics.
Week 8–12 onwards: Measurable results. Most ecommerce stores see statistically meaningful ROAS data within this window, assuming sufficient ad spend and a clean feed.

The client’s role does not end at onboarding. You will need to approve creatives, flag promotional periods, and share margin data so the agency can bid to profit rather than revenue. Agencies that never ask for margin data are optimising the wrong number.

Pro Tip: Ask your prospective agency to walk you through their PMax asset group structure and exclusion strategy before you sign. If they cannot explain it clearly, their campaigns will likely spend heavily on brand terms and low-intent queries.

How do ecommerce PPC agencies charge, and what should you budget?

Pricing models vary, and the right one depends on your ad spend level and how closely you want agency incentives aligned with your growth.

Common pricing models

Model	How it works	Best for	Watch out for
Monthly retainer	Fixed fee regardless of ad spend	Stores with stable, predictable spend	Low hours if fee is not tied to scope
Percentage of ad spend	Typically 10–20% of monthly ad spend	Scaling stores where spend grows with revenue	Agency incentivised to increase spend, not profit
Hybrid	Retainer plus a performance component	Mid-market stores wanting aligned incentives	Complexity in fee calculation
Performance-based	Fee tied to revenue or ROAS targets	High-confidence, high-spend accounts	Rare; agencies carry risk, so fees are higher

Illustrative UK budget thresholds

For Google Shopping campaigns to generate enough conversion data for meaningful optimisation, most agencies recommend a moderate monthly ad spend. For a full omnichannel programme covering Google, Meta, and Microsoft, a reasonably sized starting budget is advised, with agency fees on top.

UK Google Search CPCs have risen significantly in recent years, which means the cost of inefficiency has increased sharply. Spending £3,000 per month on clicks that convert at 0.8% is now considerably more painful than it was two years ago, when UK Google Search CPCs rose by 45% between 2024 and 2025.

Total cost breakdown beyond agency fees

Ad spend: Your primary variable cost. Set a hard monthly cap in each platform.
Feed management tools: DataFeedWatch, Feedonomics, or Channable typically cost £50–£200 per month depending on SKU count.
Reporting and analytics tools: GA4 is free; Looker Studio is free. Premium reporting dashboards (e.g. Supermetrics) add £50–£100 per month.
CRO and landing-page work: If your agency does not include this, budget separately. Poor landing pages waste paid traffic.
Setup fees: Some agencies charge a one-off setup fee of £500–£2,000 for feed builds and account restructures. Clarify this upfront.

Contract essentials

You own all ad accounts and historical data, always.
Notice periods of 30–60 days are standard; anything longer than 90 days is a red flag.
Reporting cadence and KPI definitions (ROAS, CAC, revenue) must be written into the contract.
Confirm who owns the product feed and Merchant Center account if the agency builds them.

How do you vet and choose the right ecommerce PPC agency?

The four pillars for evaluating a PPC agency are strategic alignment, technical mastery, operational transparency, and behavioural insight. Use them as your filter.

Vetting checklist

[ ] You will own your Google Ads, Meta, and Microsoft accounts with admin access
[ ] The agency has documented experience with your ecommerce platform (Shopify, WooCommerce, Magento)
[ ] They can show a published methodology for feed management and PMax
[ ] CRO and landing-page optimisation are included or clearly scoped
[ ] Reporting covers ROAS and CAC, not just clicks and impressions
[ ] They hold a current Google Partner or Premier Partner certification
[ ] They can provide ecommerce-specific case studies with ROAS or revenue lift figures
[ ] Omnichannel capability covers at least Google, Meta, and Microsoft Advertising

Ten questions to ask in the discovery call

Who owns the ad accounts and Merchant Center if we part ways?
What is your methodology for structuring Performance Max campaigns?
How do you handle feed optimisation, and which tools do you use?
What does your reporting dashboard show, and how often do we meet?
How do you measure success beyond ROAS (e.g. new customer acquisition, margin)?
Who will be the day-to-day account manager, and what is their experience level?
Can you share a case study from a store in our category or at our spend level?
How do you approach CRO when landing pages are limiting conversion rates?
What is your process for managing seasonal peaks (Black Friday, Christmas)?
How do you stay current with platform changes, particularly PMax and Google’s AI bidding updates?

Red flags to reject a candidate

The agency will not transfer account ownership if you leave.
Reporting focuses on clicks, impressions, and CTR with no mention of ROAS or CAC.
No CRO capability or no interest in your landing-page performance.
Opaque reporting with no live dashboard access.
A fixed monthly fee with no clarity on hours or deliverables.
No ecommerce-specific case studies.

Pro Tip: Ask to see a sample reporting dashboard before you sign. A good agency will show you a live Looker Studio or equivalent view that ties ad spend directly to revenue and margin. If they send you a PDF with last month’s impressions, keep looking.

Proof, credentials, and UK regulatory context you need to know

What strong proof looks like

Brainiacmedia’s ecommerce PPC work demonstrates the kind of outcome-focused approach that separates capable agencies from those optimising for activity rather than revenue. Case studies worth trusting show a clear timeframe, a named metric (ROAS, revenue lift, cost per acquisition), and a before/after comparison. Be sceptical of case studies that cite only traffic increases.

Reporting should focus on profit-based outcomes: ROAS and customer acquisition cost tied to P&L impact, with real-time or near-real-time dashboard access. Transparency in data and reporting also reduces switching costs materially: if your historical conversion signals live in an agency-owned account, you lose algorithmic performance the moment you leave.

Brainiacmedia operates across the UK, South Africa, Australia, and the US, with a full-service capability spanning web development, SEO, and digital marketing alongside paid media. That breadth matters for ecommerce clients who need CRO and landing-page work to run in parallel with their paid campaigns.

What strong proof looks like — overview diagram

UK regulatory context: what ecommerce advertisers must act on

Two regulatory developments directly affect how UK ecommerce PPC campaigns are built and targeted.

Regulation	What it covers	Practical implication for PPC
Data Use and Access Act 2025	Updates the UK’s data framework post-GDPR, governing how personal data is collected, stored, and used for ad targeting	Consent management platforms must be current; first-party data strategies become more important as third-party signals erode
HFSS advertising rules	Restricts paid promotion of high fat, sugar, and salt products to minors across paid digital channels	Food and drink ecommerce advertisers must audit audience targeting and creative approvals; age-gating is required for restricted SKUs

For most non-food ecommerce advertisers, the Data Use and Access Act is the more immediate concern. Review your consent management platform, confirm your GA4 consent mode is configured correctly, and ensure your agency is not relying on third-party audience segments that may no longer be compliant.

Key takeaways

A specialist ecommerce PPC agency delivers measurable ROAS growth by combining product feed management, Performance Max expertise, CRO integration, and transparent profit-based reporting, with full client account ownership from day one.

Point	Details
Account ownership is non-negotiable	You must retain admin access to all ad accounts and historical data before signing any contract.
CRO is a core deliverable, not an add-on	With UK Google Search CPCs up 45% (2024–2025), converting existing traffic matters more than buying additional clicks.
Timeline to results	Expect a 1–2 week audit, a 4–6 week build, and measurable ROAS data within 8–12 weeks of launch.
Total cost goes beyond agency fees	Budget for ad spend, feed management tools, and CRO work separately; setup fees of £500–£2,000 are common.
Brainiacmedia’s approach	Brainiacmedia offers outcome-focused ecommerce PPC management with full-service CRO, web development, and reporting transparency for UK stores.

Why most ecommerce stores underestimate what a PPC agency should deliver

The conventional wisdom is that a PPC agency’s job is to manage your ad accounts. That framing undersells what you actually need and lets underperforming agencies hide behind activity metrics.

The stores that see the strongest returns treat their agency as a growth partner with a stake in conversion performance, not a campaign maintenance service. That means the agency is asking about your margins, flagging landing-page issues, and pushing back when your product feed is the real problem rather than your bids.

What most business owners miss is that the technical side of PPC, setting up campaigns, building audiences, adjusting bids, is now largely automated. Google’s AI bidding and PMax handle much of it. The human value an agency adds is in the strategic layer: which products to prioritise, how to structure asset groups, where the conversion funnel is leaking, and how to interpret ROAS in the context of your actual margins. That is where the gap between a good agency and an average one shows up, and it rarely appears in a standard reporting dashboard.

Choose an agency that talks about your business model, not just your ad account.

Why most ecommerce stores underestimate what a PPC agency should deliver — overview diagram

Brainiacmedia’s ecommerce PPC and digital growth services

Brainiacmedia gives UK ecommerce businesses a genuine alternative to a single-discipline PPC agency: paid search management, CRO, and web development delivered as one integrated programme, so your landing pages and your campaigns improve together rather than in isolation.

Brainiacmedia

The practical difference is that you are not paying one agency to drive traffic and another to fix the pages that traffic lands on. Brainiacmedia’s team handles Google Shopping, Performance Max, Meta Ads, and Microsoft Advertising alongside the digital marketing services that support conversion: landing-page design, feed optimisation, and GA4 tracking setup.

Before your free audit, prepare the following:

Admin access credentials for Google Ads, Meta Business Manager, and Microsoft Advertising
Your Google Merchant Center login and current feed export
Your top 20 SKUs by revenue and margin
GA4 property access and any existing conversion event names
Your target ROAS or cost-per-acquisition, even if it is a rough figure

Book your free audit with Brainiacmedia and get a written findings report within two weeks.

Useful sources and official documentation

Google Merchant Center Help — official documentation for product feed setup, Shopping campaign requirements, and Merchant Center policies.
Google Ads Help: Performance Max — platform guidance on PMax campaign structure, asset groups, and audience signals.
Microsoft Advertising Help Centre — setup guides for Microsoft Shopping campaigns and Bing Ads account structure.
Google Analytics 4 Help — GA4 ecommerce event setup, consent mode configuration, and enhanced measurement.
ICO: Data Use and Access Act guidance — the Information Commissioner’s Office publishes updated guidance on UK data law, including consent management requirements relevant to ad targeting.
ASA HFSS advertising rules — Advertising Standards Authority guidance on HFSS restrictions for paid digital channels, including age-targeting requirements.
Brainiacmedia PPC platform selection guide — practical guidance on choosing the right paid channel for your store and audience.