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Click-Through Rate
Glossaries
| Term | Definition |
|---|---|
| Click-Through Rate | The "Click-Through Rate" (CTR) is a percentage metric that measures the effectiveness of an online advert or a link. It is calculated by dividing the number of clicks an advert receives by the total number of times the advert was displayed (impressions), and multiplying the result by 100. In short, it shows how many people, among those who saw a piece of content, actually clicked on it. What it is for / why it is importantCTR is one of the most important key performance indicators (KPIs) in digital advertising and email marketing. It is used to evaluate the relevance and attractiveness of a message: a high CTR suggests that the advert or link is relevant and persuasive to the target audience. It is fundamental because most advertising platforms (like Google Ads) use CTR to calculate the advert's "Quality Score", which in turn influences the cost-per-click (CPC) and the advert's positioning. When it is used / in what context it is usefulCTR is used in any context where you want to measure the interaction with a link: Pay-Per-Click (PPC) advertising campaigns on Google or social media (Meta Ads, LinkedIn Ads), email marketing newsletters (to measure how many users click on internal links), and in SEO analysis to assess how effective a title and meta description are at attracting clicks in the search engine results pages (SERPs). Practical exampleA banner advert for a new smartphone is displayed 10,000 times (impressions) on a website. In total, 200 people click on the banner to visit the product page. That banner's CTR is (200 clicks / 10,000 impressions) * 100 = 2%. Extra insightHaving a "high" CTR is relative. A 5% CTR might be excellent for a Google search advert, but mediocre for an email campaign to a list of loyal customers. It is a mistake to obsess only over CTR; it must always be read alongside other metrics, like the conversion rate. An extremely high CTR with zero conversions means you have created a "clickbait" advert that attracts the wrong clicks, wasting your budget. |
