What are Advantages of CSS GRID over CSS FLEX?

Answer 1

flex: for inline items e.g. links on a navbar.
grid: for 2d layouts. e.g. a square with 4 segments

Answer 2

You should check this link to get your aswer.

https://hackernoon.com/the-ultimate-css-battle-grid-vs-flexbox-d40da0449faf