Cost Per Click (CPC)
CPC doesn't tell you if you're spending too much. It tells you what you pay per click, which only becomes meaningful once compared to what that click produces downstream.
“A lower CPC is never a win by itself. It only is if the cheaper click generates the same value as the more expensive one.”
Otto GTM ObservatoryCPC is an input, not an outcome
CPC measures how much it costs to attract a click, not how much that click is worth. In B2B, where the sales cycle and customer value are high, an even significantly higher-than-industry-average CPC can be entirely justified if the generated traffic converts at a superior rate and quality.
Reducing CPC as an isolated goal often means shifting budget to less qualified but cheaper keywords or audiences, an optimization that improves the metric and worsens the overall commercial outcome.
Anti-patterns
Common mistake: setting a CPC reduction target without linking it to CAC or CPL, getting cheaper clicks that convert worse and cost more in the overall funnel.
Second mistake: comparing your CPC to generic industry benchmarks published online, which often aggregate verticals and formats too different to be a reliable reference.
Practical Application
A company reduces average Google Ads CPC from €14.20 to €8.70 by shifting budget to more generic keywords. Click volume rises 61%, but MQL conversion rate drops from 9% to 2.3%, bringing cost per MQL from €158 to €378: the CPC reduction worsened, rather than improved, the real spend efficiency.