Responsive testimonial grid section with CSS Grid

@ThanhVuong0904 Hi may l know why and what it does? does it centre the div vertically or something? If that's the case isn't it better to apply that to the div than to the body element? Your advice will be greatly appreciated.

@BhekiAccion Because you set the max-width value for the body tag, margin: auto or margin: 0 auto will help center horizontal the child tag.