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Click Through Rate (CTR)

Metric

Definition

The percentage of people who click on a link, ad, or call-to-action after seeing it.

Related Knowledge

Customer Acquisition Cost (CAC)
CTR=ClicksImpressions×100\text{CTR} = \frac{\text{Clicks}}{\text{Impressions}} \times 100

Why CTR matters

  • It dictates your costs
    1. High CTR signals to the platform algorithm that your content is relevant.
    2. Reward: lower CPC (Cost per Click) and lower CPM (Cost per Mille).
    3. Growth impact: better CTR → cheaper traffic → lower CAC (Customer Acquisition Cost).
  • It validates audience–message fit
    1. It scales volume

        1. Important caveat

        High CTR ≠ high growth
        Always pair CTR analysis with Conversion Rate (CVR).

        A campaign can have great CTR but poor CVR, leading to wasted clicks and higher CAC.

        Typical “good” CTR benchmarks

      1. Google Search
        • Facebook / Instagram
          • Email marketing
            • Display / programmatic
              • Organic search results