Google Ads for Online Stores: Your First 90 Days

Article

Bottom line

Set up the basics before you spend a single ad dollar: a Google Ads account, a properly configured Google Merchant Center feed, and conversion tracking through Google Analytics 4. With that foundation in place, launch product (Shopping) campaigns alongside search campaigns aimed at high-intent buyers, then layer in Performance Max once you have enough conversion history. For the first 90 days, your main job is collecting clean conversion data and combing through the search terms report — skip that step and no amount of campaign tweaking will help.

Before you flip the switch

A handful of technical items trip up more store owners than any targeting mistake. Check these before any campaign starts spending:

• Link Google Ads to Google Merchant Center. Without that connection, product campaigns and Performance Max campaigns with a product feed simply can't launch.
• Build a compliant product feed. Titles, categories, stock status, and prices need to match your storefront exactly, and GTIN/MPN identifiers are required wherever Google asks for them.
• Turn on conversion tracking, either directly in Google Ads or imported from GA4. Skip it and the algorithm optimizes blind, using clicks as its only signal.
• Turn on enhanced conversions from day one. It sharpens the conversion data your bidding algorithm relies on.
• Match your domain and shipping/returns policy to Merchant Center's requirements. Mismatches are a common reason accounts get disapproved or suspended.

Choosing your first campaigns

Not every format earns its keep on day one. Machine-learning-driven formats especially need a track record before they perform well, so sequencing matters:

• Shopping campaigns pull straight from your Merchant Center feed and show the product photo, price, and name. For most online stores, this is the natural starting point.
• Search campaigns targeting clear purchase-intent terms — including your own brand name — keep that traffic from going to a competitor's ad instead.
• Performance Max blends product, display, video, and more into one automated campaign. It tends to do better once your account already has conversion history; running it alone from the start makes it hard to tell what's actually driving results.
• Remarketing targets past visitors and is worth building once you have enough traffic for a meaningful audience list.

Week one: technical checks, not verdicts

It's too early to judge performance in week one — this is about catching problems before they cost you.

• Confirm in Merchant Center that products show as approved, not disapproved or pending.
• Verify conversions record correctly — run a test purchase or check the events showing up in GA4.
• Set a daily budget high enough for the algorithm to gather useful data, without exposing your account to runaway spend.
• Add your first exclusions: obviously irrelevant search terms, and any locations outside your delivery area.
• Set up a standing reporting cadence so you have a consistent view of the data from the start, not just after a month has passed.

Month one: cleanup, not a strategy overhaul

Two to three weeks in, some accounts already have enough data to draw conclusions from; others don't. Either way, this stage is for tidying up, not rewriting your strategy.

• Comb the search terms report on your search campaigns and exclude queries generating clicks without conversions.
• Check the feed for low-visibility products — sometimes a title or category fix is all it takes to get more impressions.
• Start reviewing ROAS by campaign and product group, not just as one number for the whole account.
• Don't touch the daily budget too often — big changes to budget or bids can reset a campaign's learning phase. Google Ads Help has the current rules, since they shift along with the bidding system.
• Cross-check Google Ads numbers against your real product margins. A great ROAS on a low-margin item can still lose money.

Days 30–90: decide what scales

By now your campaigns should have enough data to show what's working.

• Split Shopping campaigns into product groups by profitability, and budget the best and worst performers separately.
• Check whether Performance Max is adding incremental traffic or mostly cannibalizing what Shopping and Search would have captured anyway.
• Look at bounce rate and time on site per campaign — sometimes a low ROAS points to a site problem, not a campaign problem.
• Decide which campaigns get more budget and which get cut, based on several weeks of data, not a few days.

Common early mistakes

• Launching too many campaign types at once, so you can't tell which one is actually driving results.
• Setting the daily budget so low the algorithm never gets enough data to optimize.
• Skipping enhanced conversions and relying only on standard tracking, which can undercount conversions when a visitor declines cookies.
• Judging results after a few days instead of a full data-collection cycle.
• Treating the product feed as "set it and forget it," even though prices, stock, and categories change constantly.

FAQ

Which campaign type should an online store launch first? Shopping campaigns built on your Merchant Center feed, since they show the product photo, price, and name. Pair them with search campaigns on clear purchase-intent terms.

Should I run Performance Max from day one? It performs better once your account has conversion history. Running it alone from the start makes it hard to see what's actually driving sales.

How soon can I judge campaign results? It depends on budget and click volume — base scaling or shutoff decisions on several weeks of data, not a few days.

What's next

Want someone to set up and manage these campaigns for you? The Google Ads for online stores page covers what's included, and pricing has the ranges. Ready to talk? Get in touch.