What are the main differences between EF and EF-M lenses for Canon cameras?

EF lenses are designed for Canon DSLR cameras and have a larger mount diameter, while EF-M lenses are designed for Canon mirrorless cameras and have a smaller mount diameter. This means that EF lenses are not compatible with EF-M cameras, and vice versa. Additionally, EF-M lenses are typically more compact and lightweight compared to EF lenses.