Can somebody explain why "fly on edge of stall speed" please?
Lift increases as the Angle of Attack in increased .. up to the point of stall!
Maximum Lift occurs just as you approach the stall.
So you increase the pitch attitude until you get initial buffet, or the onset of the stick-shaker, then just ease off the back pressure ever so slightly, and hold it there!
The aim is to maximise lift and avoid ground contact. If you stall the thing during a windshear escape manoeuvre, it just wasn't meant to be!