An Amazon Alexa skill is a voice-driven capability or application that extends the functionality of Amazon's virtual assistant, Alexa. Skills enable Alexa to perform a wide range of tasks and interact with various services, devices, and platforms. Users can activate and use skills by saying specific commands or phrases to their Alexa-enabled devices, such as Amazon Echo smart speakers.

Users can discover and enable Alexa skills through the Alexa Skills Store on the Amazon website or directly through the Alexa app on their devices. This is essentially a marketplace where users can find, browse, and enable various skills developed by third-party developers. Developers submit their skills to the Alexa Skills Store, and users can explore the available skills based on categories, popularity, or search terms.