Google Ads Setup Guide for Ecommerce, Step by Step

Setting up Google Ads for a store is not hard. Setting it up so the numbers are true is where people lose months. I have watched brands spend EUR 20,000 optimizing toward a conversion count that was double-counting every order since day one, which means every decision they made in that window was made on a lie.

So this is the setup order we use, and the reason for each step. Around three hours of real work, most of it in Merchant Center.

Before you start: the three accounts

An ecom setup is three accounts that talk to each other, and people usually only know about one.

Google Ads is where the money and the campaigns live. Merchant Center is where your products live. Your store is where the sale happens and where the conversion is measured. If any one of the three is wrong, the other two report fiction.

Merchant Center in plain language, if it is new to you.

Step 1 to 3: the account, the billing, the tracking

Google's own signup flow is three parts: add your business information, pick your campaign goals and budget, and enter your payment details. It is genuinely quick.

Two things in that flow are permanent enough to slow down for.

Your time zone. Every report you ever read is in this time zone, and changing it later is a mess. Pick the one your business actually runs in, not the one your laptop is set to.

Your account type, Organization or Individual. Pick the one that matches your invoices. Google also mentions that a card may show a temporary authorization, usually cleared within a week, so do not panic when a small charge appears.

Then conversion tracking, which Google offers as the last step of signup. Do it there. Then do the part almost nobody does: place one real order on your own store and check that it shows up in Google Ads a few hours later.

If you are on Shopify, check that only one thing is sending conversions. The Google tag and the Google and YouTube app can both fire, and then one sale lands twice. Everything downstream of that is wrong, quietly, for months.

Step 4 and 5: Merchant Center and the link

Shopping ads are built from your product feed. Not from keywords, not from ad copy you wrote. Google reads your products and decides which one to show for which search. Here is how that actually works.

So create the Merchant Center account, verify and claim your website, and get the feed in, either through your store platform's app or as a file upload.

Then link the two accounts. In Merchant Center, open Access and services under Settings, choose Apps and services, then Add service, pick Google Ads, select Next, choose the account and select Link. Google's requirement is specific: only someone with admin access in Merchant Center can start the request, and only an admin in Google Ads can approve it. If someone else manages the Google Ads account, enter its customer ID, send the request, and have them approve it in Google Ads under Data manager, then Connected products.

If the link button is greyed out, it is almost always an access level problem, not a bug.

Step 6: the feed is the campaign

This is the step people skip, and it is the one that decides everything.

Open the Products tab in Merchant Center and read the diagnostics. Every disapproval is a product that cannot be shown. Every "pending" is a product that is not earning yet. Clear them before you spend anything, because a disapproved bestseller does not pause the budget. It moves the budget onto whatever is left, which is usually the product you were least excited about.

While you are in there, look at your titles. "Product 4412 - Blue" tells Google nothing. "Merino Wool Crew Neck Jumper, Navy, Men's" tells Google what to match, what to show, and what to write. Google's AI reads your feed to build ads now, so a thin feed produces thin ads.

Step 7 to 9: the first campaign

Start with one campaign. One Standard Shopping campaign across the whole catalog, or a brand Search campaign if people already search your name.

The temptation is to build the beautiful structure you read about: hero products, workhorses, bleed SKUs, tiered targets. That structure is right, and it is right in month three. In month one you do not have the data to fill it, and five thin campaigns each learn five times slower than one campaign with all the traffic.

Add your negative keyword list before traffic starts. Block free, cheap, DIY, how to make, wholesale, used, second hand, and any competitor product you do not stock. Then read the search terms report weekly, because Google says negative keywords do not match close variants. Block one spelling and the next spelling is still live.

Set a daily budget you can spend for 30 days without flinching, and then leave it alone for two weeks. Smart Bidding needs roughly 30 to 50 conversions a month before it has anything to learn from. A budget producing two sales a month never gets out of the learning phase, and every change you make resets what little it learned.

The first month does not buy profit. It buys data. Budget for it like a cost, judge it like a test, and do not touch the settings while the test is running.

- What month one is actually for

The five traps, in the order they usually bite

Double-counted conversions. Covered above, and worth repeating because it is the most expensive one. Compare Google Ads conversions to real orders for the same seven days.

Spending on a disapproved catalog. Check Merchant Center diagnostics every week for the first month, not once at setup.

Building the pretty structure too early. Consolidate first, split later, when there is data to split.

Changing something every day. Every edit resets the learning. Pick a review day and stick to it.

Judging on ROAS instead of profit. ROAS does not know your cost of goods. An account can lift ROAS and earn less, because the extra volume came from thin-margin products. Export spend and revenue per product, subtract cost of goods, and look at that instead.

If you sell a catalog sourced from suppliers, there is a sixth trap that deserves its own page: Merchant Center is much stricter about Google Ads Dropshipping catalogs than about brands with their own stock. What that setup looks like end to end.

What to do in week two

Once traffic is running, the work changes shape. It stops being setup and becomes a routine, and the routine is short.

Every day: new search terms with spend and no sales, product disapprovals, and anything spending more than it earns. Every week: budget pacing against the month, and one look at the placement report. Every quarter: structure, margin tiers, geo and device splits, and your ad assets.

The whole list, in order, is our 12-point Google Ads audit. Run it by hand the first time so you understand what each check is for.

When to stop doing this by hand

Honestly, later than most tool vendors will tell you. If you spend under $5,000 a month, do the daily list yourself. It takes fifteen minutes and you learn your own account, which is worth more at that stage than any software.

The wall shows up when the daily list is genuinely daily and you have a business to run. That is usually around EUR 10,000 a month in spend or 500 products, whichever comes first.

That is the point Scaley exists for. It reads your Google Ads account and your Merchant Center feed 24/7, tags every product by margin and how fast it sells, and hands you every bad search term, dead placement and loss-making product with the evidence attached. It writes nothing to your account until you approve it, so the account stays yours. The fee is 4% of the ad spend it manages with a $199 a month floor, and the pricing page shows the math. Full disclosure: Chris, who founded Scaley, also runs ZenoX Media, a Google Ads agency, so he sells both the software and the human version.

Get the setup right first. Then start the free trial and let the first read-only audit tell you what your new account is already leaking, or see what is inside before you decide.

Where these steps come from

The Google steps above are quoted from Google's own help pages, checked on 2026-08-20:

• Create a Google Ads account - the three-part signup, billing country and account type, the temporary card authorization, and conversion measurement as the final step.
• Link Merchant Center and Google Ads - the Access and services path, the admin access requirement on both sides, and the customer ID request flow.
• About negative keywords - negative keywords not matching close variants.

The account numbers, like the EUR 4,000 a month of waste in a first audit, come from accounts the team runs at ZenoX Media, where they have generated over EUR 200M in revenue for 200+ ecom brands.