Grid Layout is a powerful design technique used in web development and graphic design to create structured and organized layouts. It divides a page into rows and columns, allowing designers to place elements precisely within a grid. This method helps maintain alignment and consistency, making it easier for users to navigate and understand the content. By using CSS Grid, developers can easily control the size and position of items on a webpage. This flexibility allows for responsive designs that adapt to different screen sizes, ensuring a seamless experience across devices. Overall, Grid Layout enhances both aesthetics and functionality in design.