Alexa, is the voice service that powers Echo, provides capabilities, or skills, that enable customers to interact with devices in a more intuitive way using voice. Examples of these skills include the ability to play music, answer general questions, set an alarm or timer and more. Alexa is built in the cloud, so it is always getting smarter. The more customers use Alexa, the more she adapts to speech patterns, vocabulary, and personal preferences.
A skill that can handle just about any type of request.
Look up information from a web service
Integrate with a web service to order something (order a car from Uber, order a pizza from Domino’s Pizza)
Just about anything else you can think of…