The name that will be used to launch your skill. This can be different from the skill name. Once the skill is published, the invocation name can no longer be changed.
Alexa requires the invocation name to be at least two words with no special characters. If the invocation name is an abbreviation, it should contain a space and a period after each letter (e.g. Kool FM -> Kool f. m.).
Alexa will automatically recognise launch phrases. For example, if the invocation name is "Kool FM", Alexa will recognise "play Kool FM" as a launch phrase. You do not need to include "play" or other launch phrases in the invocation name.