Collection of reusable components, with clear rules, which can be grouped with different combinations to build any type of application or web, so that the design team has all the necessary information.
It helps to gain coherence and consistency in digital products as they grow and evolve. It includes everything from colors and fonts to parts of code, through interactions, editorial rules or the tone and voice of the company. Companies like Airbnb, Salesforce. Microsoft or Lonely Planet have their design systems.