Ribbing patterns are columns of knits and purls alternating each other. These patterns tend to pull in, making them great for collars and cuffs of jumpers or hats. Ribbed fabric does not roll at the edges, making it very suitable for scarves as well.
This is how a 1x1 Rib looks like in the design app:
Here are the recommended parameters for a 1x1 rib (nm7):
Stitch size: 5-7