Aerosol generating device and method for providing adaptive feedback through puff recognition

An aerosol generating device comprising:

• a heater configured to heat an aerosol generating material;
• a sensor configured to detect a user's puff;
• an output unit configured to provide feedback on the user's puff, and
• a controller configured to:
• determine a remaining number of available puffs based on a detection result of the sensor,
• compare the remaining number of available puffs with a predetermined threshold,
• maintain a first output mode of the output unit based on determining the remaining number of available puffs is equal to or greater than the predetermined threshold, wherein a first output notification is provided to the user in the first output mode, and
• change the first output mode to a second output mode based on determining the remaining number of available puffs is less than the predetermined threshold, wherein a second output notification different from the first output notification is provided to the user in the second output mode.