How is click-through rate (CTR) defined?

Click-through rate (CTR) is defined as the ratio of clicks to ad impressions. This metric is vital in digital marketing as it measures how effectively an advertisement engages its audience. A higher CTR indicates that a greater percentage of people who see the ad (impressions) are clicking on it, which often suggests that the ad is relevant and appealing to the audience. It serves as a key performance indicator for ad effectiveness, allowing marketers to evaluate their campaigns and make necessary adjustments to improve engagement and conversion rates.

The other options, while they relate to digital marketing metrics, do not accurately define CTR. For instance, tracking user interactions with a webpage encompasses actions beyond just clicks on an ad, making it a broader measure. The number of conversions pertains to successful actions taken by users after clicking through, which also extends beyond the scope of CTR. Lastly, measuring traffic from social media posts focuses on the reach and engagement from social media platforms, which is separate from the concept of click-through rates associated specifically with advertisements.