Why choosing the right agency matters
An average e-commerce ad budget of €2,000 per month costs you €24,000 a year with a poorly performing agency — with little to show for it. Most webshops only realise this after months because the reports look good, but revenue numbers lag behind.
The problem: many agencies optimise on metrics that look impressive (CTR, impressions, click volume) but don't directly contribute to profit. A good e-commerce marketing agency optimises on what matters: ROAS, conversion rate, and profit margin.
What a good e-commerce marketing agency does
1. They think in profit margin, not just revenue
A ROAS of 4x sounds impressive. But if your margin is 20%, you're losing money at any ROAS below 5x. An agency that understands e-commerce asks about your margin structure, sets a minimum target ROAS per product category, and adjusts campaigns based on profitability — not gross revenue.
2. They build on data, not assumptions
Accurate conversion tracking isn't optional — it's the foundation of everything. A good agency checks at the start whether your Google Ads conversions are correct, whether GA4 is properly configured, and whether server-side tracking is in place. Without reliable data, you're flying blind.
3. They communicate openly — even when results disappoint
Every ad account has periods of underperformance. An agency that only sends reports when things are going well and goes quiet when they're not is a red flag. Ask explicitly: how do you communicate when a campaign underperforms?
4. They know the technical side of e-commerce
Shopping Ads run on a product feed. That feed — with titles, categories, GTINs, and images — largely determines your results. An agency without feed expertise misses one of the most powerful optimisation levers. Ask if they have experience with Google Merchant Center, feed management tools, and Performance Max campaign structures.
Questions to ask an agency
- What ROAS have you achieved for comparable webshops — and what was the starting position? An agency that can't reference concrete cases with context is suspicious.
- How do you handle my product feed? If the answer is vague, you know enough.
- How do you measure success — and who owns the account? Account and data ownership is non-negotiable.
- What is your approach for the first 90 days? A good agency has a concrete onboarding plan: tracking, feed, campaign structure, learning phase.
- How do you report — and which metrics are central? Revenue, ROAS, and new customers come first. Impressions and CTR are context, not goals.
Red flags at an e-commerce marketing agency
- No access to your own Google Ads account. Your ad money, your data. Always.
- Guaranteed results. No serious agency guarantees a specific ROAS or revenue — results depend on too many variables.
- Minimum 12-month contracts. Serious agencies are confident enough to offer shorter terms.
- No fixed point of contact. If you speak to someone different every time, nobody knows your account well enough.
- Automated reports without explanation. Data without context is useless. Your agency should help you understand what the numbers mean.
How Adsvantage approaches e-commerce marketing
At Adsvantage we work purely performance-based: results are measurable, transparent, and provable. Our approach for e-commerce webshops:
- Feed-first approach — we always start with the product feed, not the campaigns. An optimised feed is the foundation for everything that follows.
- Tracking in order — conversion tracking, GA4, and server-side tagging are configured and validated in the first week.
- Margin-aware campaign structure — we segment by margin using custom labels so higher bids always go to profitable products.
- No long-term contracts — we work on a monthly basis. If we don't deliver results, you're not locked in.