The ‘preserveAspectRatio’ attribute in SVG is used to control the aspect ratio and alignment of an SVG viewport. It ensures that the image’s proportions are maintained when it scales, preventing distortion. I’ve utilized this attribute in web development projects where responsive design was crucial. For instance, while designing a logo that needed to maintain its aspect ratio regardless of screen size, I set ‘preserveAspectRatio’ to “xMidYMid meet”, ensuring the image scaled uniformly from the center without being cropped or squished.