Ads are usually designed with a specific screen size in mind. A phone screen is narrow and vertical, so images, text sizes, and layouts are set up to fit that format. When the same ad appears on a wider computer screen, elements can stretch, overlap, or look out of proportion because nothing was adjusted for the larger display. Text that looked clean on a phone can appear tiny on a desktop, and images designed to fill a small screen may leave awkward empty spaces on a big one. Good ad design requires building separate versions or using a layout that adjusts automatically to different screen sizes. Do you think advertisers pay enough attention to how their ads look across different devices before publishing them?