What is a KPI? Key performance indicator explained

What is a KPI? Key performance indicator definition and examples

A KPI (key performance indicator) is a measurable value that shows how well a company, team or campaign is progressing toward a specific business goal. A KPI differs from an ordinary metric because it is tied to a target and a deadline. The idea became mainstream after Robert Kaplan and David Norton published the balanced scorecard in Harvard Business Review in 1992, with 4 perspectives of performance.

Updated: 17 October 20263 min read

KPI key performance indicator in numbers: balanced scorecard year and perspectives, SMART criteria, marketing budget share — Source: Kaplan and Norton, HBR 1992; Gartner CMO Spend Survey 2025

What is a KPI?

A KPI is a metric that the business has chosen as decisive for reaching a goal. TechTarget defines KPIs as quantifiable measures that stakeholders use to track factors crucial to the organisation’s objectives, in areas from finance and sales to marketing and IT. Revenue, conversion rate or customer retention become KPIs only when someone owns them and compares them with a target.

KPI vs metric

The difference between a KPI and a metric is the link to a goal. Every KPI is a metric, but most metrics are not KPIs.

	Metric	KPI
Purpose	describes an activity or process	shows progress toward a goal
Example	website sessions, items sold	organic leads per month vs target
Number tracked	dozens or hundreds	a few per team
Owner	often none	a named person or team

Where do KPIs come from? The balanced scorecard

Modern KPI thinking comes largely from the balanced scorecard by Robert S. Kaplan and David P. Norton, published in Harvard Business Review in January 1992. They argued that financial results alone are not enough and proposed 4 perspectives:

Financial: cash flow, sales growth, operating income.
Customer: how customers see the company, such as quality and service.
Internal business: the processes that matter most to customers.
Innovation and learning: the ability to launch products and improve.

Types of KPIs

KPIs are usually grouped by timing and by level, and a good dashboard balances both.

Leading and lagging KPIs

Lagging KPIs report results that already happened, such as quarterly revenue. Leading KPIs predict future results, such as new sales bookings or demo requests, so you can react earlier.

Strategic and operational KPIs

Strategic KPIs track long-term company goals at the top level. Operational KPIs cover narrower, short-term processes, such as weekly ticket response time.

How to set a good KPI (SMART)

A good KPI follows the 5 SMART criteria:

Specific: it names exactly what is measured.
Measurable: it has a clear formula and data source.
Achievable: the target is realistic.
Relevant: it supports a business objective.
Time-bound: it has a deadline.

KPI examples in marketing and SEO

Marketing KPIs matter more each year because budgets are under pressure. Gartner’s 2025 CMO Spend Survey of 402 marketing leaders found budgets flat at 7.7% of company revenue, and 59% of CMOs said they lack the budget to execute their strategy. Clear KPIs are how marketing proves its value. Typical examples:

Organic leads or sales from SEO, tracked as key events in Google Analytics 4.
Organic CTR for priority pages in Search Console.
Cost per lead in paid campaigns.
Share of brand mentions in AI answers for a fixed prompt list.
MRR growth for SaaS companies.

In Google Analytics 4, actions you mark as important are now called key events. Google renamed them from conversions so that the term conversion means the same in Analytics and Google Ads. In my SEO measurement setups I tie each KPI to one key event, so reports and targets use identical numbers.

Pro tip: Limit each team to 3 to 5 KPIs and give each one an owner, a target and a review date. Rankings and traffic are useful metrics, but report organic revenue or leads as the KPI, because that is what management approves budgets for.

Frequently asked questions about KPI

What does KPI stand for?

KPI stands for key performance indicator. It is a measurable value that shows progress toward a specific business goal, such as monthly revenue or lead volume.

What is the difference between a KPI and a metric?

A KPI is a metric linked to a goal, a target and an owner. Metrics describe activities in general, while KPIs are the few numbers that decide whether a strategy is working.

How many KPIs should a team have?

A team should usually track 3 to 5 KPIs. More than that dilutes focus, while the remaining numbers can stay as supporting metrics on a dashboard.

What are good KPIs for SEO?

Good SEO KPIs measure business results: organic leads, organic revenue and conversion rate from organic traffic. Supporting metrics include impressions, CTR, rankings and, increasingly, brand mentions in AI answers.

Sources

What are key performance indicators (KPIs)? · TechTarget
Kaplan and Norton: The balanced scorecard, measures that drive performance (summary) · Management And Accounting Web
Gartner 2025 CMO Spend Survey reveals marketing budgets have flatlined at 7.7% of overall company revenue · Gartner
[GA4] Key events and conversions · Google Analytics Help

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In international SEO and AI search the right KPI is organic revenue or leads per market, not rankings alone. I help companies set measurable SEO and GEO goals for each country and track them in one consistent report.

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