What is an image that appears on a Web page automatically when page itself is loaded?

An image that appears on a web page automatically when the page loads is often referred to as a "banner image" or "hero image." This image typically serves as a prominent visual element, capturing the attention of visitors and conveying the main message or theme of the page. It can also be used for branding purposes or to enhance the overall aesthetic of the website. Additionally, such images are often set as the background of a section or as part of a slideshow that cycles through multiple images.