Material Design is a visual language that synthesizes the classic principles of good design with the innovation of technology and science.
It is used all across Google’s product suite, from Google Docs through Google Search to Google Maps.
Google headlines the Material Design homepage with this synopsis:
“Material Design is a unified system that combines theory, resources, and tools for crafting digital experiences.”
So Material Design is simply a set of rules, guidelines, components and best practises for creating websites and apps.
With Material Design, you are really standing on the shoulders of design giants. Google has developed Material Design as the culmination of their experience and knowledge in digital experience design — They have made the mistakes so you don’t have to.
This means you can save a lot of time because you don’t need to develop your own visual language and you can sidestep common design pitfalls.
By using Material Design, you are tapping into a very famous visual language.
This means that your users subconsciously attribute a level of trust and security to your app beyond its station because they will associate your app with Google.