There are different kinds of directives that users can use to interact with Alexa.

Here are some examples:

Turn settings on and off

"Alexa, turn on my purifier."
"Alexa, turn on night mode."
"Alexa, turn off humidification."

Control number settings

"Alexa, set the bedroom fan speed to 7."
"Alexa, turn up the bedroom fan speed."
"Alexa, decrease the bedroom fan speed by 3."

Changing mode settings

"Alexa, set oscillation to wide."

Temperature controls (for Dyson heaters)

"Alexa, make it warmer in here."
"Alexa, make it cooler in here."
"Alexa, turn off the heat."