Digital accessibility refers to ensuring digital content is viewable and usable by people with disabilities. This might include features such as screen readers that read aloud a website for a user with visual impairments, closed-captioning on videos for individuals with hearing impairments, images that include "alt text" for individuals with visual impairments, and websites that are navigable by keyboard for users who may not be able to operate a mouse.
Increasing accessibility can also improve the usability of your content for everyone. Following best practices can improve overall user experience, help non-native English speakers, and increase search engine optimization. Additionally, when designers and contributors consider accessibility from the start, it can be significantly faster and cheaper than waiting to address problems after users encounter accessibility barriers.