You need to master both Flexbox and CSS Grid in order to professionally build modern websites & web apps. If you haven't mastered both of them yet, I highly recommend going through my CSS Course.
CSS Grid is a 2-step process. Step 1: create a grid (consisting of columns and rows). Step 2: place grid-items somewhere on that grid.
Flexbox works differently. You pick a direction with Flexbox: either horizontal (row) or vertical (column). Flex-items are then laid out along that direction. The default is horizontal (row).
Because you specify 2 axes in CSS Grid (you use both rows and columns in constructing the grid), CSS Grid is a 'two-dimensional' system.
With Flexbox you specify 1 direction, so it's a 'one-dimensional' system.
That's it, really.
By the way, I think CSS is the 'bottleneck' to most websites & web apps. I believe it's the highest-ROI skill you can master.
Before I mastered CSS, I lost a ton of time & energy fiddling around with CSS.
So I created a CSS course to help you avoid the same mistake. Check it out here if you're interested.
Would you like to be notified when I release a new course? You'll get early bird discounts. Sign up for my newsletter here.
Also, I show projects of upcoming courses on social media, follow me here: