Amazon Alexa is a cloud-based voice assistant developed by Amazon, integrated into Echo devices and other smart products. Alexa allows users to perform various tasks through voice commands, such as playing music, setting reminders, controlling smart home devices, answering questions, and providing weather updates. Alexa also supports thousands of third-party "skills," expanding its functionality to include things like ordering products, controlling entertainment systems, or managing home security. With its growing ecosystem, Alexa is widely used for home automation and voice-controlled convenience, making everyday tasks more efficient while continually learning and improving based on user interactions.