Speech-to-text is a technology that converts spoken language into written text. It uses algorithms and machine learning to recognize words and phrases from audio input, allowing users to dictate messages, create documents, or control devices hands-free. This technology is commonly used in various applications, such as virtual assistants like Siri and Google Assistant, transcription services, and accessibility tools for individuals with disabilities. By improving accuracy and speed, speech-to-text enhances communication and productivity in both personal and professional settings.