Matt Gibson, Chief Commercial Officer at Cyber-Duck, discusses the need for an intersectional approach to digital design that considers both people and the planet. He outlines how poor digital design can negatively impact users, society and the environment by wasting resources. Gibson then provides 10 foundations for sustainable web design, such as reducing content footprints, prioritizing accessibility, optimizing assets and collecting only necessary data. The talk emphasizes that digital design must change to become more sustainable through research, lean practices and iterative improvements.