Heater controls query

Can someone provide a bit of info.
what is this the purpose of this heater control ?
as far as i can tell it just changes the fan speed and temp, but why ?
I just seems to change the speed and temp to a default setting, in my case fan speed 3 and temp 24.
Im not sure what other purpose its there for ?

Follow the manual (page 53):
Quick Launch function (button 10)
Using the interior temperature sensor, this function automatically activates:
– If cold temperatures are detected (below around 4°C):
• Heating (High)/Heated seats/Heated steering wheel.
• Air distribution towards the footwells and maximum air flow.

– If mild temperatures are detected (between approximately 4°C and 35°C):
• Air conditioning (AUTO FAST).
• Automatic air distribution and maximum air flow.
• Temperature setting at 21°C.

– If hot temperatures are detected (above around 35°C):
• Air conditioning (Low)/Ventilated seats.
• Air distribution towards the side and central vents and maximum air flow.

► To activate/deactivate the function, press button 10.

ah, right ok.

I copied from the manual so I had to sort it out.