General Terms
Key Performance Indicator
Critical metrics that measure success against strategic business objectives.
Definition
Key Performance Indicators are quantifiable measurements used to evaluate the success of an organization, employee, or campaign in meeting objectives for performance. In digital advertising, KPIs are specific metrics chosen to reflect campaign goals and business outcomes.
Examples
Return on Ad Spend (ROAS) as a KPI for e-commerce campaigns
Cost Per Lead (CPL) as a KPI for B2B marketing
Brand awareness lift as a KPI for brand campaigns
Frequently asked questions
Common questions about Key Performance Indicator, answered.
What is a key performance indicator (KPI)?
A key performance indicator is a metric chosen because it measures progress toward a specific, important goal. Out of the many metrics available, KPIs are the vital few that actually indicate whether you're succeeding — they focus attention and decisions on what matters. A KPI ties a measurement directly to an objective, so movement in the KPI reflects real progress (or lack of it) toward that goal.
What makes a good KPI?
It's tied to a clear objective, measurable and trackable, actionable (you can influence it), and meaningful (it genuinely reflects success, not vanity). Good KPIs are specific and often have targets and timeframes. The key test: does moving this number mean you're getting closer to the goal? Metrics that look impressive but don't connect to outcomes (e.g. raw impressions for a sales goal) make poor KPIs.
What's the difference between a KPI and a metric?
All KPIs are metrics, but not all metrics are KPIs. A metric is any quantifiable measure; a KPI is a metric deliberately selected because it indicates progress toward a key goal. You might track dozens of metrics, but only a handful are KPIs — the ones that matter most for your objectives. The distinction is about significance and selection: KPIs are the metrics you steer by.
What are common marketing KPIs?
They depend on the goal: awareness goals use reach, impressions, and brand lift; engagement uses CTR, watch time, and engagement rate; acquisition uses conversions, cost per acquisition (CPA), and conversion rate; efficiency uses return on ad spend (ROAS); and value/retention uses customer lifetime value (LTV), retention, and repeat rate. The right KPIs match the objective of the campaign or program rather than a one-size-fits-all list.
How do I choose the right KPIs?
Start from the objective, then pick the few metrics that most directly indicate progress toward it — and that you can act on. Avoid vanity metrics that look good but don't reflect real outcomes, and match KPIs to the funnel stage (reach for awareness, conversions for performance). Limit yourself to a focused set so attention isn't diluted, set targets, and revisit them as goals evolve. The aim is a dashboard that tells you whether you're winning, not just what's happening.
