Nowadays designers commonly do not create webpages or app screens, but focus on designing a design system instead. Thanks to Brad Frost, who introduced us to the Atomic Design methodology, we have started to change our workflow in that direction and it is pretty awesome!
A design system does much more than serve as a UI kit or a style guide. It contains all the necessary assets, rules, patterns, structures, flows and even the team values. These make it possible for many designers and developers to collaborate efficiently on the same product and keep the design consistent.