Why Build Alexa Skills? – Beginner Alexa Developer Tutorial

The Alexa developer console has a built-in Alexa simulator, which is similar to testing on an actual Alexa-enabled device. After testing your skill with the Alexa simulator, we recommend gathering user feedback to resolve issues and make improvements before submitting your skill for certification.

https://developer.amazon.com/en-US/alexa/alexa-skills-kit/get-deeper/tutorials-code-samples/build-an-engaging-alexa-skill/module-1