The V Flex and H Flex elements help you design the layout of your site more quickly. That's because the V Flex and H Flex elements are just div blocks that have been pre-set to flex.
V Flex is set to vertical flex, which means that child elements placed in the div will flow vertically (i.e., up to down). H Flex is set to horizontal flex, which means that child elements placed in the div will flow horizontally (i.e., left to right).