Nicole Percival Nicole Percival

Paid marketing produces a constant stream of data, but more data does not automatically mean better decisions.

Most teams in a business are not short on metrics, but they could be short on clarity about which numbers truly indicate performance and what actions those numbers should trigger.

When leading paid marketing efforts, two goals are often kept in mind: balancing day-to-day optimisation with credible reporting, and ensuring paid marketing supports business goals without becoming a black hole that consumes budget. One way to do that is to tighten the marketing KPIs you’re tracking.

Tracking too few may not give you the full picture, while tracking too many could overwhelm you with data and make data-driven decision-making difficult. Which ones you track will entirely depend on your goals, but 5-7 KPIs that cover your entire marketing funnel could be just enough.

Read on to find out what they are and why tracking them is key to your business’s online success.

Why tracking paid marketing is so important

Paid marketing is one of the few growth levers where you can change inputs and measure results quickly. However, it only works when measurement is solid. Without reliable tracking, you are effectively guessing with expensive consequences.

Tracking matters because it protects three things: budget efficiency, team focus, and credibility.

If you can see which campaigns are producing incremental value, you can scale winners with confidence and pause losers early. If you can see where performance breaks down, you can direct your team’s effort to the right fix rather than constantly reinventing creative or targeting. And if you can tie spend to outcomes using consistent definitions, you can communicate performance clearly to finance, sales, and leadership.

Tracking also reduces internal conflict. Many performance disputes are not about strategy, but about measurement. When the sales team says the leads are poor and the marketing department says the CPL is great, the problem is usually that the organisation is not tracking quality and downstream conversion in a shared way.

Discover the common paid search advertising mistakes hurting your ROI.

The consequences of not tracking (or tracking poorly)

When tracking is weak, teams tend to optimise for what the ad platform makes easy to see, not what the business actually needs.

That typically leads to four outcomes:

  1. Budget drifts into vanity performance: Spend shifts toward cheap clicks, high engagement, or low-cost leads that look good in-platform but don’t translate into new customers, revenue, or pipeline.
  2. Issues are spotted too late: Without the right indicators, tracking gaps can hide problems until weeks of budget are gone and the impact shows up as missed targets.
  3. Scaling becomes risky and political: If you cannot prove performance holds at higher spend and ties back to outcomes, budget increases feel like guesswork rather than an informed investment.
  4. Reporting loses credibility: When leaders do not trust the numbers, performance reviews turn into debates about data integrity instead of decisions about what to do next.

But what KPIs should you be tracking to avoid these scenarios?

The 7 KPIs to track for paid marketing

1. Spend and budget pacing

Spend is the simplest KPI, but it’s also one of the most important.

Marketing teams often focus on results and overlook pacing, but pacing issues are frequently the first sign something is wrong. If you’re underspending, you may be missing growth opportunities or your campaigns could be restricted due to audience size or bids. If you’re overspending, you may be exposing the business to risk, especially if performance isn’t stable.

Pacing is a practical control metric. It tells marketing managers whether their plan is being executed as intended, and it can tell CMOs whether they’re investing in line with priorities and seasonality, or are they reacting week-by-week.

When spend and results move together, you can attribute performance changes more confidently. When they do not, pacing could provide the answer to why.

Tracking frequency: weekly at a campaign-group level

2. Impressions and reach

Impressions and reach are not “success” metrics on their own, but they are essential for diagnosing delivery and scale. While impressions tell you how often ads are shown, reach tells you how many unique people saw them (which is especially relevant in paid socials and video.)

These KPIs answer questions like “Are we actually in market?”, “Are we saturating a small audience?”, and “Did performance change because the platform delivered less volume or because the audience responded differently?”

If impressions drop sharply after a targeting change, you may have constrained delivery too much. If impressions rise but results fall, you may be scaling into less-qualified inventory or audiences.

In multi-channel marketing, impressions and reach are also a guardrail against over-allocating to one platform simply because it reports conversions more aggressively. If one channel is doing most of your reach but another gets most of the attributed conversions, you may have an attribution imbalance rather than a true performance gap.

Tracking frequency: 2–3 times per week for active campaigns, weekly in reporting.

3. Frequency

One of the clearest early signals of creative fatigue and audience saturation, frequency measures how often the same person sees your ad.

It naturally rises in retargeting, limited geographies, niche B2B audiences, and any situation where budgets increase faster than audience size.

However, how frequency informs your decision making depends on context. A higher frequency can be appropriate during a short promotional period or when you have a narrow, high-value audience. But rising frequency paired with declining click-through rate, rising cost per result, or weaker conversion rate usually indicates you are “over-serving” the audience with the same message.

If that’s the case, a bidding tweak isn’t going to fix your metrics. The fix is usually creative rotation, messaging variation, audience expansion, or tighter exclusions so you don’y keep showing the same ads to people who have already converted.

Frequency is also a brand experience metric — overexposure can create negative sentiment, especially when targeting is broad and the creative is repetitive.

Tracking frequency: Weekly

4. Click-through rate (CTR)

CTR tells you what proportion of impressions turn into clicks. Across channels, CTR is a useful indicator of relevance and creative effectiveness.

In search, the CTR is heavily influenced by keyword intent and ad position. In social, it reflects how compelling the creative and offer are to the audience delivered.

CTR matters because it helps you separate “the ad is not landing” from “the landing page is not converting.” If CTR is weak, you likely have an audience-message mismatch or creative that does not earn attention. If CTR is strong but conversions are weak, your problem is probably on-site or offer-related.

Improving CTR without negatively impacting the business should be done carefully. Clickbait copy, vague curiosity hooks, or overly broad promises can drive clicks that do not convert, but also develop a negative brand image. That is why CTR should be interpreted alongside conversion rate and cost per acquisition rather than treated as a standalone goal.

Tracking frequency: Weekly for stable campaigns, every 2-3 days for campaigns in active testing.

5. Cost per click (CPC)

Something that is partly within your control through creative quality, relevance and account structure, CPC is the cost you pay for each click. However, it is also partly driven by market conditions (think competition, seasonality, and inventory).

This is a particularly useful metric as the data often changes before outcomes do. A rising CPC could signal increased competitions or declining ad relevance, but if CPC rises while CTR falls, you may need to schedule a creative refresh, tighten your targeting, or improve your ad relevance signals.

Marketing leaders should resist the urge to chase “cheap clicks” as a strategy. Low CPC traffic is only valuable if it converts. In many categories, the cheapest clicks come from broad, low-intent audiences that look good on surface metrics and quietly damage overall efficiency.

Tracking frequency: Weekly at a minimum.

Read our guide to understanding Average CPC and Average Cost.

6. Cost per acquisition (CPA) or cost per lead (CPL)

CPA (for customers/purchases) and CPL (for leads) translates your digital performance into a unit cost.

This is one of the most actionable KPIs for both paid marketing managers and CMOs because it supports scaling decisions and channel comparisons. However, CPA/CPL is only as good as your conversion definition.

If one platform counts a “conversion” differently than another, or if you change tracking mid-month, your CPA/CPL trend can become misleading. It is also important to avoid optimising to CPL in isolation in B2B, where lead quality can vary dramatically.

Tracking frequency: Weekly for decision-making, 2–3 times per week to prevent waste on higher-budget accounts.

7. Downstream quality and revenue efficiency (SQL rate and CAC/ROAS)

At leadership level, the most important question is not “Did we generate conversions?” but “Did we generate outcomes the business values?”

That means tracking at least one downstream quality KPI (such as SQL rate, meeting-booked rate, opportunity creation rate, or close rate) and one revenue efficiency KPI, such as CAC, ROAS, or payback.

These metrics protect you from “cheap conversion traps,” where campaigns look efficient in-platform, but produce weak pipeline or low-margin revenue. They also improve alignment with sales and finance by tying marketing activity to measurable business impact. Because attribution is imperfect, these KPIs should be treated as directional and compared consistently over time.

Tracking frequency: Monthly for quality and revenue efficiency, weekly for preliminary ROAS/CAC if your funnel is short.

How to interpret these KPIs together (so they lead to decisions)

The biggest KPI mistake is treating metrics as separate scorecards instead of a connected system.

In practice, each KPI answers a different “where is the problem?” question.

If spend is not pacing, you may have a delivery or setup issue. If impressions and reach are stable but CTR falls, you may have creative fatigue or weaker relevance. If CTR holds but landing page view rate drops, you likely have a technical or experience problem.

If clicks are fine but conversion rate drops, your offer, landing page, checkout, or form may be the issue. If conversions hold but lead quality declines, you are attracting the wrong people or misaligning expectations. If everything looks fine in-platform but ROAS or CAC worsens, you may have attribution gaps, margin shifts, or downstream conversion problems that the platform cannot see.

This is why the “right” KPI to track depends on the question you are trying to answer.

Day-to-day optimisation often lives in CTR, CPC, and conversion rate, while performance governance lives in CPL/CPA, quality rate, and ROAS/CAC. Strategic direction lives in incremental impact, payback, and the relationship between paid and overall growth.

Neede to refresh your vocabulary? Here’s our ultimate PPC glossary.

Unsure how to move forward with KPI tracking?

Tracking KPIs and measuring performance can feel like a whole job on its own, let alone taking into account the analysis and guided decision-making required after.

With the support of a PPC agency like Submerge, you could reduce the amount of time and money spent collecting and gathering performance data, and brainstorm optimisation ideas with those who have a deep understanding of the paid online world and your industry. With your knowledge of the unique way your organisation works and an agency’s external perspective and expertise, better track your paid marketing efforts and more easily turn them into profitable strategies with long-term potential.

Learn more about Submerge’s PPC agency services, including Google Ads and paid social, or book a free consultation with us today.