Click-through rate for display advertising, also known as CTR, is a measure of the effectiveness of online advertisements in generating clicks from viewers. It is calculated by dividing the number of clicks an ad receives by the total number of times it is displayed, expressed as a percentage. A high click-through rate indicates that the ad is successfully capturing the attention of its target audience and enticing them to click through to the advertiser’s website. This metric is crucial for advertisers as it helps them gauge the success of their campaigns and make informed decisions about their advertising strategies.