Google Ads for e-commerce — the complete guide from zero to scale

Summary

  • Start with tracking, not campaigns. Google Ads tag, Enhanced Conversions, Consent Mode V2 Advanced. Without the right data every campaign is flying blind and Smart Bidding is optimising on thin air.
  • First campaign = Search on branded queries + Shopping. Branded Search captures people searching for you by name (cheap conversions). Shopping puts your products right in the search results. This is the foundation.
  • Add PMax only after 50+ conversions a month. Before that the algorithm doesn't have enough data. Until then, build your data foundation through Search and Shopping.
  • The product feed matters more than the campaigns. Product titles, high-quality images, correct categories and attributes — that's what decides whether your product shows up for the right query. A bad feed = bad results regardless of your setup.
  • Scale gradually: Search → Shopping → PMax → Demand Gen. Add each next step only once the previous one is working. Not everything at once.

The difference isn't in the budget. It's in the order of the steps, the quality of the data and patience. Most stores make the same mistake: they launch everything at once, without proper tracking, with underfunded campaigns and unrealistic expectations. A month later they switch it all off, deciding that "Google Ads doesn't work."

This article is a map. We'll walk the path from absolute zero to scale, step by step — what to launch in what order, which milestones to watch and when to add the next campaign types.

Step 0: Get the foundations right (before you spend a penny)

This is the step most stores skip. And then they wonder why the campaigns aren't working.

Conversion tracking

There's no point launching campaigns without proper tracking. You need:

If you're not sure how to set this up, ask your developer or agency. It takes a few hours, but without it every step that follows is pointless.

Product feed

For Shopping and PMax campaigns you need a product feed in Google Merchant Center. And its quality determines success more than most people realise.

Product titles — the most important attribute. They have to contain what people search for, not your internal naming. "Women's Nike Air Zoom Pegasus 41 running shoes, black" is better than "Nike AZP41 BLK."

Images — high quality, on a white background, from multiple angles. The main image decides whether someone clicks. If it looks like a phone snap on a blurry carpet, nobody clicks.

Categories and attributes — the correct Google Product Category, colour, size, material, GTIN (EAN code). The more attributes you fill in, the more accurately Google matches your product to the right query.

Prices and availability — they have to match what the customer sees on the site. A mismatch = the product gets disapproved.

This is the foundation, and it pays to do it properly. A bad feed = bad results, no matter how much you spend on campaigns.

Google Ads account

Create the account, link it to Google Merchant Center, set up billing and check that auto-tagging (the GCLID parameter) is switched on. Set up a basic negative keyword list — words like "jobs," "employment," "how to make," "free" and "second-hand" don't belong in your campaigns.

Step 1: Brand Search + Standard Shopping (months 1–2)

Branded Search

The first campaign to launch is Search on your brand name and domain. Why? Because if someone is searching for you by name, you want to be visible. The CPC is low (typically 1–5 CZK, ≈ €0.04–0.20), the conversion rate is high and the ROAS is excellent.

"But why pay for people who are searching for me by name?" Because competitors can target your branded queries. And because a brand campaign gives you valuable conversion data for Smart Bidding — the foundation for every other campaign.

Bidding strategy: Maximize Conversions (fine to begin with).

Standard Shopping

The second campaign — Standard Shopping. Your products appear directly in the search results with an image, price and name. For e-commerce stores it's one of the most effective channels.

Why Standard Shopping and not PMax straight away? Because Standard Shopping gives you transparent data — you can see exactly which products and queries are working. PMax is a black box that you first need to feed with data. And you get that data from Standard Shopping.

Bidding strategy: Maximize Conversion Value (optimise for value from the start, not just the number of orders).

What to watch in the first 2 months

Step 2: Non-brand Search + optimisation (months 2–4)

Once your brand and Shopping campaigns are running and collecting data, add non-branded Search. These are campaigns on generic queries like "women's running shoes," "gift for dad" or "best espresso machine."

Campaign structure

Split your campaigns by intent:

Why separate them? Because product queries have a higher conversion rate and deserve a bigger budget. Informational queries have a lower conversion rate but reach people at the start of their decision.

Smart Bidding

After you've collected 30+ conversions (from branded Search + Shopping), switch to Smart Bidding:

The rule: set your targets to your current figures, not your dream ones. Move them by 10–15% every 2–4 weeks.

Step 3: Performance Max (months 4–6)

Once you have 50+ conversions a month from Search and Shopping, it's time to add PMax. Why only now? Because PMax needs conversion data so its algorithm can optimise effectively. Without data it's an expensive experiment.

What PMax adds:

When setting up PMax, don't forget to:

Step 4: Scaling and Demand Gen (month 6+)

If Search, Shopping and PMax are profitable, you have two paths:

Vertical scaling (more money into what works)

Increase the budget on the campaigns with the best ROAS. By no more than 20% at a time. Watch whether the CPA starts to climb — if it does, you're at the edge of efficiency and more money won't help.

Horizontal scaling (new channels)

Add Demand Gen campaigns to reach new audiences. Demand Gen shows ads on YouTube, in Shorts, Gmail and Discover — reaching people who aren't actively searching for your product but match your customer profile.

For Demand Gen you need:

Consider AI Max for Search

If your Search campaigns run on exact and phrase match and you want to widen your reach, AI Max for Search adds keywordless targeting and dynamic copy. It works best for niche products with limited search volume.

Timeline: From zero to a full-funnel setup

Phase Month What to launch Minimum budget
Foundations 0 Tracking, feed, account 0 CZK (setup)
Launch 1–2 Brand Search + Standard Shopping 15,000–30,000 CZK/mo (≈ €600–1,200)
Growth 2–4 Non-brand Search + Smart Bidding 30,000–80,000 CZK/mo (≈ €1,200–3,200)
Expansion 4–6 Performance Max 80,000–150,000 CZK/mo (≈ €3,200–6,000)
Scaling 6+ Demand Gen + AI Max 150,000+ CZK/mo (≈ €6,000+)

This is an indicative plan. Smaller stores may stay on individual phases longer. Larger stores may move faster. What matters is the order, not the speed.

At LK Media we've used this exact approach with dozens of e-commerce stores. One of them — nanoSPACE — grew from 3M CZK (≈ €120K) in revenue to 150M CZK (≈ €6M) a year. Not overnight, but step by step, with a focus on data and gradual scaling.

In closing

Google Ads for an e-commerce store isn't a sprint, it's a marathon. Start right — tracking, feed, branded Search and Shopping. Collect data. Add campaigns gradually, only once the previous ones are working. And scale based on the numbers, not on gut feeling.

The single most important lesson? Don't touch the campaigns until you have data. Tracking is the foundation. The feed is the foundation. Everything else rests on that.

Want help setting up Google Ads for your e-commerce store? Email info@lkmedia.cz — we'll put together a plan tailored precisely to your situation and budget.

FAQ

What's the minimum budget for Google Ads for an e-commerce store?

To get started we recommend a minimum of 15,000–30,000 CZK (≈ €600–1,200) a month (branded Search + Standard Shopping). For meaningful scaling with PMax you need 80,000+ CZK (≈ €3,200) a month. Below 10,000 CZK (≈ €400) a month Smart Bidding doesn't have enough data and the results will be unstable. It's better to invest more into fewer campaigns.

What should I launch first — Search, Shopping or PMax?

Search on branded queries + Standard Shopping. In that order. Brand Search captures people searching for you by name (cheap conversions, great data for Smart Bidding). Shopping shows your products directly in the results. Add PMax only once you have 50+ conversions a month — earlier it doesn't have enough data.

How important is the product feed?

Extremely. The feed decides whether your product shows up for the right search query, how the ad looks and how much you pay per click. Product titles have to contain what people actually search for. The images have to be high quality. Categories and attributes have to be filled in correctly. A bad feed = bad results, even if your campaigns are set up perfectly.

When should I add Performance Max?

Once you have at least 50 conversions a month from your Search and Shopping campaigns. PMax needs conversion data so its algorithm can optimise effectively. Launching PMax with 10 conversions a month is premature and will most likely lead to wasted budget.

How quickly will I see results from Google Ads?

Branded Search and Shopping usually bring in the first conversions within a few days. Smart Bidding needs 2–4 weeks to learn. PMax needs 4–6 weeks. A realistic plan: first profitable results in 1–2 months, stable performance in 3–4 months, full scaling in 6+ months. Google Ads isn't "switch it on and earn" — it's a process.