From Float to Flex, from Flex to Grid, there are tons of layout skills to be learned.
Grid is for two dimensional layouts. Grid is like a magic. Layout could be nicely done. Thinking of Flex, we have to deal with wrap, justify-content and so on. Glad to learn it. Grid makes things easy.
Another trick I learn was “background-attachment:fixed” This is very cool if you have a nice background image.