CSS Grid Layout introduces a two-dimensional grid system to CSS. Grids can be used to layout major page areas or small user interface elements.
If you're new to grids, here 's an amazing cheatsheet by Alsa Creations.
Can you use it in prod ?
At the time of writing, Can I Use indicates a global availability of CSS Grid Layout of 84.9%, rising to 88.11% if you include the prefixed version in IE10, 11 and current Edge.
And here's a link to an amazing tutorial to learn CSS grid layout, step by step.