Banner ads are online advertisements that are displayed on web pages, often using graphical images and text to promote products or services.
Click-Through Rate (CTR) is a metric that measures the number of clicks an ad receives divided by the number of times it is shown (impressions).
Impressions refer to the number of times an ad is displayed on a webpage, regardless of whether it is clicked.
Conversion Rate is the percentage of users who take a desired action after clicking on a banner ad, such as purchasing a product or signing up for a service.