Online marketing

Google Ads for small businesses — what to know before the first click.

Published April 24, 2026 · 8 minutes read · Happy Media

"Give me €500 and fill my calendar with clients" — that's the fantasy Google Ads sells to first-time advertisers. In practice, the first three months are usually either a struggle or money burned — depending on how willing you are to learn.

Here's what a small business needs to realistically know before the first click.

What Google Ads is and how it works

Google Ads is a system where you pay to have your ad appear when someone searches a specific word or phrase on Google. Payment is per click (Cost Per Click — CPC). You don't pay for impressions — you pay when someone clicks on your ad and lands on your site.

Cost per click varies dramatically:

• Cheap clicks (€0.10–0.30) — local services with low competition, specific niches.
• Mid-range clicks (€0.30–1.50) — most services in Serbia.
• Expensive clicks (€2–10) — legal services, finance, insurance, technology.

Who this is a good channel for

Google Ads works best when a client is actively seeking a solution:

• Urgent services (AC repair, plumber, locksmith).
• Specific products (when someone knows what they're looking for by name).
• Professional services with clear intent (dentist, lawyer, accountant).
• B2B services with specific queries.

Google Ads doesn't work well for:

• Impulse purchases (Instagram/Facebook works better there).
• Products people don't yet know exist.
• Generic categories where big players have budgets 100× yours.

Budget — what's the minimum

Honest minimum for a small business — €300 monthly ad budget per platform. Below that, the algorithm has too little data, the campaign can't learn, results are inconsistent.

Realistic numbers for the first 90 days:

• Month 1 (learning): ~€300-500 budget. Goal — collect data. CPA is likely high.
• Month 2 (optimization): €300-500 budget. Unprofitable keywords eliminated, ads refined.
• Month 3 (profit): If setup was good, positive ROI should be visible now.

Rule: if after 90 days the campaign doesn't bring in more revenue than it costs, something is fundamentally wrong — landing page, product-market fit, or targeting. Google Ads can't fix a weak product.

Strategy — campaign before ads

Before you launch the first ad, you must answer these five questions:

1. What's the goal of the campaign? Sales? Call? Form fill? Catalog download? Each goal requires different structure.
2. What's your unique advantage? If you're "the same as others", CPC will eat you. Better price? Faster delivery? Specific warranty?
3. How much can you pay per client (CPA)? If a client brings you €500 profit, €50 CPA is great. If they bring €50, €50 CPA is catastrophe.
4. Is the landing page ready? Sending Google Ads traffic to a weak page = wasting money. Landing-page conversion is more important than CPC.
5. How will you measure success? Google Analytics 4, conversions, calls — everything must be set up BEFORE the first campaign.

Five most common mistakes

1. Broad match keywords without control. Google's default settings will burn your budget on irrelevant queries. Use negative keywords and monitor Search Terms report.
2. Sending everything to the homepage. If you're advertising "AC unit service", the click should go to the AC service page — not to the homepage with all 10 services.
3. No conversion tracking. Without conversion goals set, Google's algorithm can't optimize — and you don't know what brings money.
4. One ad for the whole campaign. A/B testing isn't optional — it's basic hygiene. Minimum 3–4 variants.
5. No remarketing. 95% of first-time visitors don't buy immediately. Remarketing is the most profitable segment. Without it — half the money goes to waste.

DIY or with an agency

Realistically, here's how it works:

• DIY: You can. But count on 3–6 months of learning and probably €500-1500 lost to mistakes. Makes sense if you have time and affinity.
• Agency: €150-300 monthly for management or 15-20% of budget. Saves your time and mistakes. Pays off if your time is worth €20+/hour.
• Hybrid: Cheapest model long-term — hire an agency for 3-6 months to set everything up properly, then take over management and occasional optimization.

Quick summary

• Minimum ad budget — €300 monthly per platform.
• Minimum time to profit — 60–90 days.
• Most important thing — clearly defined goal and conversion measurement.
• Remarketing — mandatory, most profitable segment.
• Landing page — more important than CPC.

More about our online marketing and Google Ads campaigns. For a concrete plan — book a consultation.