A screen reader is a software application that helps individuals with visual impairments access digital content. It converts text displayed on a computer or mobile device into synthesized speech or braille, allowing users to hear or feel the information. Screen readers can read aloud web pages, documents, and emails, making technology more accessible. Common screen readers include JAWS, NVDA, and VoiceOver. These tools work with various operating systems, such as Windows and macOS, and can be used with different applications. By providing auditory or tactile feedback, screen readers enable users to navigate and interact with digital environments effectively.