You Don't Need to Understand Everything
Google Ads has dozens of metrics, columns, and reports. It's designed for professional marketers, not business owners. You don't need to understand everything in the platform — you need to understand five numbers. These five tell you whether your campaigns are working, where problems are developing, and whether your money is being spent well.
Metric 1: Impressions (Are People Seeing You?)
Impressions is the count of how many times your ad was shown. It tells you reach — how visible you are in your market. If impressions are low, your budget might be too small or your targeting too narrow. If impressions are high but clicks are low, your ad copy might not be compelling enough.
The related metric to watch is impression share — the percentage of available impressions you're capturing. If your impression share is 40%, that means your ads are showing for 40% of eligible searches and missing the other 60%. Low impression share usually means competitors are outbidding you.
Metric 2: Clicks and Click-Through Rate (Are People Interested?)
Clicks tell you how many people tapped your ad. Click-through rate (CTR) tells you what percentage of people who saw your ad clicked on it. A healthy CTR for local service ads is typically 3-8%. Below 3% suggests your ad copy or targeting needs work. Above 8% is excellent.
Low CTR with high impressions means people are seeing your ad but not finding it compelling enough to click. This is usually an ad copy problem — the headline, description, or offer isn't speaking to what the searcher needs.
Metric 3: Cost Per Click (How Expensive Is Your Market?)
Cost per click is how much you pay each time someone clicks your ad. This varies dramatically by industry — plumbing might be $30-$50 per click while dog training might be $5-$15. High CPCs aren't inherently bad if the leads and jobs they generate are worth it. Low CPCs aren't inherently good if the clicks don't convert.
Watch for CPC trends more than absolute numbers. A sudden spike in CPC can indicate increased competition, a Quality Score drop, or market seasonality. Gradual CPC increases are normal as markets mature.
Metric 4: Conversions and Cost Per Lead (Is It Working?)
This is the most important number. Conversions are the actions that matter — phone calls, form submissions, quote requests. Cost per lead divides your spend by your conversions. If you spent $3,000 and got 60 calls, your cost per lead is $50.
If conversions are low but clicks are high, the problem is your landing page — people are clicking your ad, visiting your site, and leaving without calling. If conversions are low and clicks are low, the problem is further up the funnel — your ads aren't getting enough traffic.
Metric 5: Conversion Rate (How Efficient Is Your Funnel?)
Conversion rate is the percentage of clicks that become leads. If 100 people click and 10 call, your conversion rate is 10%. For local service businesses, a healthy conversion rate on Google Search is 8-15%. Below 5% signals a landing page or targeting problem.
This metric connects your ad performance to your website performance. A great ad with a poor landing page produces a low conversion rate. A mediocre ad with a great landing page produces a high one. If your conversion rate is below benchmarks, the fix is usually on your website — not in your Google Ads settings.
The Bottom Line
Impressions tell you if people see you. CTR tells you if they're interested. CPC tells you what the market costs. Cost per lead tells you if it's working. Conversion rate tells you how efficient the system is. If your agency can explain these five numbers in plain English every month, you have the information you need to make smart decisions about your advertising.