gTTS (Google Text-to-Speech) is a Python library and CLI tool that interfaces with Google Translate's text-to-speech API. It allows users to convert text into spoken words using Google's high-quality vocal synthesis. The library supports multiple languages and accents available through Google Translate, making it versatile for various applications involving speech synthesis. Users can easily integrate gTTS into their projects to generate audio files in formats such as MP3, which can be played back in audio players or implemented in software requiring voice output.