Flexbox is a new layout method that was introduced in CSS3, made to create and control layouts using CSS. By using grids (flex container), it allows you to modify the width or height of child elements to dynamically fill available spaces in the best way possible. It is highly valuable when developing for different screen sizes.
Flexbox (Flexible Box) is a method that aims to provide a more efficient way to build powerful dynamic layouts by efficiently laying out, aligning and distributing space among items in a container. It can be implemented on all sorts of modules but is best on smaller sized web apps.
If you ever needed it applied on a comments section of your website, here’s a detailed explanation on how it can be done.