Amazon Polly is a cloud service that converts text into lifelike speech. It uses advanced deep learning technologies to produce natural-sounding voices in multiple languages. This allows developers to create applications that can read text aloud, enhancing user experience in various fields such as education, entertainment, and accessibility. With Amazon Polly, users can choose from a variety of voice options and adjust speech parameters like pitch and speed. The service is designed to be easy to integrate into applications, making it a popular choice for businesses looking to add voice capabilities to their products and services.