Does the AI Overview below contradict itself?  Compare the 1st paragraph to 2nd paragraph.  I think I agree with the first paragraph, but dang I’m confused.  At least the adjustment procedure is the same either way - twerk it back and forth until you get the idle high and smooth.  AI also should have mentioned setting the idle as low as possible when the procedure is performed.

Turning an air/fuel mixture screw clockwise makes the mixture leaner (less fuel/more air), while turning it counter-clockwise makes it richer (more fuel/less air); however, this applies to an "air screw" (metering air), and for a "fuel screw" (metering fuel), the effect is opposite, so always check its location (airbox side = air screw; engine side = fuel screw) or tip (blunt = air, pointy = fuel) to know for sure, with the general goal of finding the highest, smoothest RPM.
 
How to identify and adjust:
Identify the Screw: Look at the carburetor's location relative to the engine.
Air Screw (on airbox/filter side): Meters air. Clockwise (in) = richer (less air); Counter-clockwise (out) = leaner (more air).
Fuel Screw (on engine side/bottom):Meters fuel. Clockwise (in) = leaner (less fuel); Counter-clockwise (out) = richer (more fuel).
Tip: Air screws often have a blunt tip; fuel screws have a pointy tip.

Adjustment Steps (General):
Warm up the engine completely.
Gently turn the screw all the way in (clockwise) until lightly seated (don't overtighten) to find the baseline, then back it out to the factory setting (e.g., 1.5 turns).
Turn the screw in (clockwise) until the engine stumbles, then out (counter-clockwise) until it stumbles again.
Adjust to the midpoint between these two points for the highest, smoothest RPM.

Easier way to visualize this is that if it is fuel screw, screwing it in chokes off the fuel flow and the mixture gets leaner.

If the screw is the air screw then screwing it in chokes off airflow and the mixture goes richer.

Yep....what he said.

Either screw turned clockwise moves inward and chokes off flow.

Either screw moved counterclockwise moves outward and allow more flow.

More fuel means richer....more air means leaner.

  If the screw is the air screw then screwing it in chokes off airflow and the mixture goes richer.

I have a question ,  the main air flow is not what's being adjusted here - so what air flow is being adjusted ?

I would think - the air flow to the bowl is what's being adjusted .  
  
Is there not a small vent hole from the top of the bowl area going to the main air flow right behind the butterfly ?

In the Vacuum of the carb bowl  fuel is being sucked up into the main air flow through the Main Jet . So , increasing the air flow into the bowl could "reduce" the suction of fuel out of the bowl ?:

My first guess : Counter clock-wise = less fuel out of the bowl
My second guess : Ask Lancer