PPC metrics show how paid campaigns attract attention, spend budget, generate conversions, and record value. This guide explains seven core metrics, what each can and cannot tell you, and how to choose a reporting set that matches your campaign goal.
Key takeaways
- Click-through rate (CTR) is clicks divided by impressions. For example, 800 clicks from 40,000 impressions produce a 2% CTR. Average cost per click (CPC) is total click cost divided by clicks.
- Google Ads conversion rate uses trackable ad interactions as its denominator. It is not always conversions divided by clicks and can exceed 100%.
- Cost per conversion and return on ad spend (ROAS) depend on which conversion actions and values the platform records. Check the setup before comparing campaigns.
- Quality Score and impression share diagnose specific Google Search constraints. Neither is a universal measure of campaign success.
- Compare channels only after you align the outcome, attribution view, currency, and period. Choose the KPI for the decision first; automate collection once the definitions are stable.
Your cost per click is down. Good news? Maybe. Cheaper traffic only helps if it brings the right people to your site and they take the action you want. No PPC metric tells the whole story on its own. This guide explains how seven common metrics work together, so you can spot what changed and make a better call on your budget.
What are PPC metrics?
PPC metrics measure ad delivery, clicks, cost, conversion activity, and recorded value. The campaign objective determines which should be primary. CTR and impression share help explain visibility and response. Average CPC measures traffic cost. Conversion rate and cost per conversion explain how efficiently defined actions occur. ROAS compares recorded value with ad cost. Quality Score helps diagnose keyword relevance in Google Search.
These are related signals, not seven competing targets. A campaign can earn cheap clicks and still miss its lead-quality goal. The task is to select one primary outcome, then use the other metrics to explain its movement. Check out our broader marketing analytics guide for the relationship between channel reporting and business decisions.
Which PPC metrics should you track?
Start with these seven metrics, then select the ones that answer your campaign question. The definitions below follow Google Ads where a platform formula is specified. Other platforms may use different click, conversion, or attribution rules.
| Metric | Calculation or scale | What it helps you decide | Main limit |
|---|---|---|---|
| Click-through rate (CTR) | Clicks ÷ impressions | Is the ad earning clicks when shown? | Compare like networks and objectives; a universal target is misleading. |
| Average cost per click (CPC) | Total click cost ÷ clicks | What does paid traffic cost? | Cheaper clicks may not produce better outcomes. |
| Conversion rate | Conversions ÷ trackable ad interactions in Google Ads | How often do eligible interactions lead to recorded actions? | The denominator is not always clicks; counting settings matter. |
| Cost per conversion | Cost ÷ included conversions | What is the average ad cost for a defined action? | The result changes with conversion definitions and does not show profitability. |
| Return on ad spend (ROAS) | Recorded conversion value ÷ ad cost | How much recorded value accompanies each unit of spend? | Platform value is not margin, profit, or incremental return. |
| Quality Score | Google Search keyword diagnostic, 1–10 | Which keyword relevance component needs inspection? | It is not an auction input or account KPI. |
| Impression share | Impressions ÷ estimated eligible impressions | Is visibility limited within the eligible auction set? | Eligibility is estimated; it is not the whole market. |
1. Click-through rate (CTR)
CTR is the share of impressions that produced a click. Google Ads defines it as clicks divided by impressions. If a campaign records 800 clicks from 40,000 impressions, its CTR is 2%.
Compare CTR within a similar network, objective, audience, and period. A search ad and a paid-social awareness ad have different contexts. If CTR falls for a stable search query group, check the ad message, match to intent, and current search results before changing the bid. A rising CTR is useful only if those clicks support the campaign outcome.
2. Average cost per click (CPC)
Average CPC is the total cost of clicks divided by the number of clicks. A campaign that spends $4,000 on 2,000 clicks has a $2 average CPC. Google distinguishes this reporting average from a maximum CPC bid.
A cheaper click is not automatically more valuable. Put CPC beside conversion rate, cost per conversion, and recorded value. If CPC rises, isolate the campaigns, keywords, audiences, and devices behind the change before adjusting bids or targeting.
3. Conversion rate
In Google Ads, conversion rate is conversions divided by the number of trackable ad interactions in the same period. The denominator can include clicks or other eligible interactions, depending on campaign type. If 100 interactions produce 12 conversions, the reported rate is 12%. The rate can exceed 100% when multiple conversions are counted for one interaction. Google explains the definition.
Before comparing conversion rates, check the included actions, counting method, attribution settings, and reporting window. If the rate drops while CPC holds steady, investigate traffic quality, the landing page, and tracking rather than assuming the ads alone caused it.
5. Cost per conversion
Cost per acquisition is the average ad cost for the conversion actions included in reporting. Google Ads labels the column Cost / conv. If a campaign spends $6,000 and records 120 included conversions, cost per conversion is $50. The number depends on which actions appear in the Conversions column. Google's conversion reporting guide explains that scope.
This is not necessarily customer acquisition cost. A form fill, qualified lead, and new customer can have very different values. Name the action when it matters: “cost per qualified lead” is clearer than an unqualified CPA for a lead-generation decision. Compare lead quality, value, and margin before calling a lower figure a business win. PPC reporting use cases show ways to organize these checks.
6. Return on ad spend (ROAS)
ROAS divides recorded conversion value by ad cost. A campaign with $25,000 in recorded conversion value and $5,000 in spend has a ROAS of 5.0, or 500% when expressed as a percentage. Google Ads calls its corresponding ratio Conversion value / cost. Conversion reporting definitions depend on the actions and values assigned in the account.
ROAS is not profit or ROI. It leaves out product margin and wider costs, and the platform may attribute value differently from your business reporting. If ROAS changes, separate the effects of conversion volume and value per conversion. Check currencies and value rules before reallocating budget.
7. Quality Score
Quality Score is a Google Search keyword diagnostic on a 1–10 scale. Its components are expected CTR, ad relevance, and landing-page experience. A below-average ad-relevance component suggests checking the match between the keyword and message.
Google says Quality Score is not a KPI and is not an input in the ad auction. Do not aggregate it into an account performance target or claim that raising the score directly changes auction outcomes. Use its components to choose a specific relevance investigation.
8. Impression share
Impression share is impressions received divided by the impressions Google estimates an ad was eligible to receive. If an ad appears 8,000 times from an estimated 10,000 eligible opportunities, its share is 80%. Eligibility reflects factors such as targeting, approval status, and quality. Google explains the estimate.
A low share may justify checking lost impression share from budget or rank. It does not automatically justify more spend: first confirm that additional exposure would serve a worthwhile goal. For more platform-specific fields, see Google Ads metrics.
When is CPM useful?
Cost per thousand impressions (CPM) is spend divided by impressions, multiplied by 1,000. If an ad set spends $800 for 100,000 impressions, its CPM is $8. It helps diagnose the cost of exposure in reach and awareness campaigns, especially beside frequency, reach, and downstream response. LinkedIn lists average CPM in Campaign Manager; Google also uses CPM bidding for eligible impression-based formats. CPM alone says nothing about clicks or conversions.
How do Meta and LinkedIn metrics compare?
Meta Ads Manager offers link clicks, link CTR, cost per link click, cost per result, and purchase ROAS among its reporting columns. Choose link metrics when the question is traffic to a destination; “clicks (all)” can include other interactions with the ad. Meta explains the click distinction.
LinkedIn Campaign Manager reports average CTR from chargeable clicks and impressions, average CPC from spend and clicks, average CPM, conversions, and cost per conversion. Its click definition depends on the ad set objective, and some formats have separate reporting rules. LinkedIn's metric definitions spell out those boundaries. Google Ads Quality Score and impression share have no direct universal equivalents in this list. Map the decision across platforms, then retain each platform's actual field name and definition.
How do you choose PPC KPIs by campaign goal?
Choose the smallest set that answers the business question. A primary KPI reflects the intended outcome; supporting metrics help diagnose movement.
| Campaign goal | Primary KPI | Supporting diagnostics | Decision |
|---|---|---|---|
| Qualified site traffic | Cost per qualified visit or another defined quality outcome | CTR and average CPC | Which ads or audiences deserve more traffic budget? |
| Lead generation | Cost per qualified lead | Lead volume, conversion rate, average CPC | Is the constraint traffic cost, conversion, or lead quality? |
| Ecommerce revenue | ROAS, assessed against margin | Conversion rate, order value, volume | Does spend produce enough valuable business? |
| Search visibility | Impression share | Lost share from budget or rank, average CPC | Is more eligible exposure worth pursuing? |
| Keyword relevance | Quality Score components as diagnostics | Expected CTR, ad relevance, landing-page experience | Which alignment issue should the team investigate? |
The keyword-relevance row is a diagnostic use case, not a recommendation to make Quality Score the campaign's business KPI. Compare each campaign with its own like-for-like history before using an external benchmark.
How should you compare PPC metrics across channels?
Compare the same business outcome and measurement window across platforms. Align conversion definitions, qualification rules, assigned values, attribution views, currencies, time zones, and periods before comparing cost per conversion or ROAS.
Nielsen's 2025 Annual Marketing Report surveyed 1,400 global marketing professionals; 32% said they measure traditional and digital media spending holistically. That finding concerns more than PPC, but it illustrates the difficulty of consistent cross-channel measurement.
Compare the same outcome
Put qualified leads or recorded revenue beside spend for each channel. Compare cost per qualified lead only when Google Ads, Meta Ads, and LinkedIn use the same qualification rule and reporting window. The cheapest platform conversion may look less attractive after lead quality is included. A paid channel mix report for Looker Studio can centralize the view, while keeping the definitions visible.
Benchmark against comparable campaigns
Use your own history in the same network, objective, geography, and conversion setup as the first baseline. External studies can add context, but their samples are not universal targets. For instance, LocaliQ's 2026 search advertising benchmarks report a 6.64% average CTR across thousands of its customers' Google Ads and Microsoft Ads campaigns in more than 20 industries. That is a mixed-platform customer sample, not the average Google Ads CTR for every advertiser. The published industry figures vary widely. Compare the relevant industry and format, then return to your own trend and business outcome.
Track budget pacing
A pacing view should show planned spend, actual spend, variance, days remaining, and projected period-end spend. These fields help decide whether to hold, reduce, or increase the budget. Note promotions, seasonality, and delayed conversions before acting on a short period. The monthly budget pacing template offers a starting structure.
Which advanced metrics add business context?
Customer lifetime value, attribution, and incrementality help answer questions that platform-reported cost and conversions cannot settle. Use them when a budget decision justifies the additional data and analysis.
Customer lifetime value
Customer lifetime value (LTV) estimates what a customer generates over the relationship. It may explain why a campaign with a higher cost per conversion still deserves investment. For a subscription campaign, compare the acquired customers' retention and value, not just the initial conversion cost. The estimate needs reliable customer and revenue data; it cannot excuse a high acquisition cost without evidence.
Attribution modeling
Attribution assigns conversion credit across touchpoints according to a chosen model. Meta might introduce a prospect who later converts through Google Search. The credit assigned to each platform changes with the model and tracking coverage. Use an aligned outcome and inspect the assumptions before shifting spend.
Incrementality testing
Incrementality asks whether ads generated conversions beyond what would have occurred without exposure. A well-designed test can separate demand created from demand merely captured. Its conclusion still depends on the test design and sample. See the incrementality testing guide for when the method fits.
How do you build and automate a PPC report?
Build the report around a decision. Show the primary KPI, a suitable comparison, diagnostic context, and the next action. Automate data collection after the definitions are stable.
Start with the decision
If a stakeholder asks whether to increase lead-generation spend, show qualified lead volume and cost per qualified lead before CTR or CPC. Add diagnostics only when they explain the outcome or identify an action.
Show the comparison that explains the change
Put the current period beside a comparable baseline. Record budget, promotion, targeting, and conversion-tracking changes. A weekly shift might need the same weekday or prior-week comparison; a seasonal campaign may need a year-over-year view. Keep currency and attribution windows visible.
Choose a useful visual
Here are the best visuals to answer common PPC reporting questions.
| Reporting question | Visual | Context to include |
|---|---|---|
| How did a metric change? | Line chart | Comparison period and relevant campaign or tracking changes |
| Which campaigns differ? | Bar chart | Same platform, objective, currency, and period |
| Is spend on pace? | Pacing table or cumulative line | Plan, actual spend, variance, and days remaining |
| Which channel produced the outcome? | Table with spend, volume, cost per outcome, and value | Aligned outcome definition and attribution view |
Automate repeatable collection
Supermetrics can connect Google Ads, Meta Ads, and LinkedIn Ads data to Google Sheets, Looker Studio, Power BI, or a warehouse. Scheduled reports reduce repeated exports, but refresh timing depends on the source, connector, and destination. Supermetrics' data connection overview covers the available paths.
In a Supermetrics customer case study, Sleeping Giant Media said its monthly reporting process fell from seven days to a few hours after adopting Supermetrics for Google Sheets. That is one agency's reported result, not a guaranteed saving for every team.
Translate the result for stakeholders
State the outcome, the interpretation, and the next check. For example: “CTR rose 20% and cost per qualified lead fell by $2 over the same period. Qualified lead volume also increased. We'll continue the audience test and review lead quality before moving more budget.”
The example reports a concurrent change without claiming the ad test caused it. The marketing reporting guide offers more on adapting the view for decision-makers.
Choose PPC metrics that lead to a decision
Start with the outcome your campaign is meant to produce. Use delivery and cost metrics to diagnose the result, then align measurement before comparing channels. Once the logic is sound, automate the recurring report so the team can spend more time investigating and acting on what changed.
Start a free 14-day Supermetrics trial to connect your paid-media sources to the reporting destination your team uses.
