Google Ads for E-commerce: What a Google Partner Agency Actually Does

What it really means to work with a certified Google Partner and why it makes all the difference for your online store.

If you run an online store in Greece, you already know that Google Ads is one of the most powerful channels for customer acquisition. But there’s a world of difference between simply running Google Ads campaigns and managing them strategically to deliver maximum ROI.

E-commerce comes with challenges that simply don’t exist in standard lead generation campaigns: dynamic inventories with hundreds or thousands of SKUs, seasonality, competitive pricing, Shopping campaigns, cart abandonment remarketing, and the need to measure ROAS (Return On Ad Spend) rather than a simple CPA.

This is precisely where working with a certified Google Partner agency changes the game.

The Google Partner badge isn’t just a logo you put on a website. It’s a certification awarded by Google to agencies that meet rigorous, ongoing criteria:

• Certified specialists: at least two actively certified Google Ads professionals on the team
• Proven performance: the agency must demonstrate measurable, consistent results for its clients
• Minimum ad spend: a defined threshold of managed budget a reliable indicator of real-world experience
• Continuous learning: access to beta features and direct training from Google

In practice, choosing a Google Partner agency means choosing a team that Google itself trusts and invests in.

Managing Google Ads for an online store is a fundamentally different discipline from simply launching a campaign. A seasoned Google Partner agency follows a structured, four-phase approach:

Before a single euro is spent, we conduct a thorough audit of your store:

• Understanding your catalogue structure categories, top performers, profit margins
• Reviewing historical data where available: Google Analytics, previous campaign performance
• Competitive analysis mapping what your competitors are doing on Google Shopping
• Defining target ROAS by product category
• Tracking audit ensuring every conversion and revenue event is measured correctly

Campaign structure is the foundation everything else is built on. For e-commerce, we use a carefully balanced mix of four campaign types:

• Google Shopping / Performance Max: Product visibility with a visual, intent-driven format
• Search Campaigns: Capturing branded queries and high-intent keyword searches
• Dynamic Remarketing: Re-engaging visitors who browsed but didn’t buy
• Smart Bidding: AI-powered bidding strategies (Target ROAS, Target CPA) for continuous optimisation

One of the most impactful and most overlooked elements of e-commerce advertising is the Google Merchant Center:

• Resolving all product feed errors
• Rewriting product titles to include high-volume search keywords
• Applying the correct Google Product Category taxonomy
• Setting up custom labels to segment by margin, seasonality, and stock levels

In our experience, feed optimisation alone can increase ROAS by 20–35% without touching the budget.

• Weekly performance reviews by category and individual product
• Budget reallocation based on ROAS trends and seasonal demand
• A/B testing across ads, extensions, and landing pages
• Negative keyword management to eliminate wasted spend
• Bid adjustments by device, time of day, and location

The true value of a Google Partner agency shows up in the numbers. Here’s what we’ve delivered for our clients:

Energy present in 130+ countries worldwide
Objective: Strengthen TotalEnergies’ digital presence in Greece across all key channels.
What we did: Full management of Google Ads and Meta Ads campaigns, SEO optimization and social media content strategy.
Results: +25.51% Visitors | +14.54% Key Events | +300% Page Engagement

DHL Express Greece
International Express Logistics 55% market share in Greece
Objective: Build brand awareness and expand the B2B client network in the Greek market.
What we did: Developed a comprehensive Media Plan and executed targeted Meta Ads and Google Ads campaigns focused on B2B decision-makers.
Results: Significant uplift in brand awareness and qualified B2B leads through a focused digital media strategy.

Industrial Equipment (B2B) established 1935, active across Greece & the Balkans
Objective: Increase online visibility and drive qualified traffic for a specialist B2B industrial equipment business.
What we did: Designed and built a new corporate website, ran seasonally optimized Google Ads campaigns, and implemented an ongoing SEO strategy.
Results: +100% Users | +7.83% Sessions | +30.79% Contact Page Visits

It’s a question we hear often. Here’s an honest, side-by-side comparison:

As a rule of thumb: if your monthly ad spend exceeds €1,500, working with a Google Partner agency will consistently deliver a stronger ROI than any alternative.

After years of working with online stores across Greece, these are the pitfalls we encounter most often:

Mistake 1

Tracking clicks, not revenue: Many businesses measure conversions without capturing transaction value. Without revenue data, you can’t calculate ROAS and Google’s AI can’t optimise for what it can’t see.

Mistake 2

One campaign for everything: Lumping all products into a single Shopping campaign means losing granular budget control across categories and margins.

Mistake 3

Neglecting the Merchant Center: Feed errors and poorly written product titles translate directly into low Shopping visibility. Fix the foundation first everything else depends on it.

Mistake 4

No remarketing strategy: Between 70-80% of visitors won’t convert on their first visit. Without remarketing, that audience is simply lost.

Mistake 5

Static budgets all year round: Failing to scale spend during peak periods Black Friday, Christmas, summer means missing your highest-potential sales windows.

1. How much should I budget for Google Ads in Greece?

The minimum that makes meaningful sense for an e-commerce store is €500-800 per month in ad spend. For more competitive categories fashion, electronics, home goods we typically recommend €1,500-2,000/month to generate enough data for effective optimization.

2. When will I start seeing results?

Initial data starts coming in within the first two weeks. Real optimization gains typically emerge in months one and two as Google’s AI learns from your campaign. By the 90-day mark, you’ll have a clear, reliable picture of performance.

3. What’s the difference between Google Shopping and Performance Max?

Standard Google Shopping gives you full control over bidding and targeting. Performance Max is AI-driven and places your ads across all Google channels Search, Shopping, Display, YouTube, and Gmail. We typically use both in combination, depending on your goals and budget.

4. How do you measure success?

For e-commerce, ROAS (Return On Ad Spend) is the primary metric how much revenue each euro of ad spend generates. We also track CPA (cost per purchase), conversion rate and average order value to give you a complete performance picture.

5. Do I need a Google Partner agency if my store is small?

Even smaller stores with a €500/month budget benefit from a well-structured strategy. Poor campaign setup is expensive regardless of scale wasted ad spend always costs more than professional management.

DigitalUp is a certified Google Partner with a proven track record across e-commerce and B2B businesses in Greece.

Get in touch for an audit of your current campaigns.