What does "Mobile First" design emphasize?

"Mobile First" design emphasizes the principle of creating websites and applications with a focus on mobile devices before considering larger screens like tablets and desktops. This approach stems from the fact that mobile devices often have different constraints and features, such as smaller screen sizes and varying bandwidth. By starting the design process with mobile in mind, developers ensure that the core functionality and content are optimized for the limited screen real estate available.

This strategy promotes a more efficient use of resources, as it necessitates prioritizing the most important elements of a website or application. Consequently, once the mobile version is established, the design can be progressively enhanced for larger screens, ensuring that features and layouts are adapted in a way that maintains usability and aesthetic coherence across all devices. Emphasizing mobile first also helps developers cater to an increasingly mobile-centric user base, leading to improved user experiences on smartphones and tablets.