Closed captioning addresses a wide range of accessibility needs for permanent, temporary and situational disabilities. The caption are presented in a visual, text-based format, and timed well to sync with the spoken words in the video, making it accessible to people who rely on reading to follow along with the video. 

It makes video content accessible for individuals with permanent disabilities such as deaf or hard-of-hearing, individuals with temporary disabilities such as hearing impairment, people learning new language and situational disability due to environment factors like noise.