Yes, there is a very important reason images should be a certain size, and that reason is speed. Images that are too large take longer to load, and that slows down the website. When a website loads too slowly, visitors get impatient. Everyone has had the experience of waiting on a page for too long and then simply backing out before it finishes loading.
That same thing happens to potential customers. If your website takes too long to load because the images are too heavy, people may leave before they even see your content. Research and real-world behavior both show that once loading time gets too high, user experience drops and the likelihood of losing the visitor goes up.
So image sizing is really about optimization. The goal is to keep the image quality strong enough to look professional, but not so large that it harms page speed. That balance matters because a good website has to do two things at the same time: look good and load fast.
In that sense, image size is not just a technical detail. It directly affects user experience, bounce rate, and conversion potential.
The answer explains that image sizing matters primarily because oversized images slow down the website. Slow websites create frustration, and frustrated users often leave before taking any action. The speaker makes the connection between image optimization and business performance very clear: if images are too large, the website may look good visually but fail functionally because users do not wait around for it to load. The ideal approach is to keep images visually strong while reducing unnecessary file weight. This protects speed without sacrificing design quality. The broader takeaway is that image sizing is not just a design preference or developer concern—it plays a direct role in user experience, visitor retention, and the site’s ability to convert traffic into leads.