You just bled the brakes and the pedal is still soft or spongy - frustrating, because bleeding is supposed to fix exactly that. Almost always it means air is still hiding somewhere in the system. Here is why, and how to finally get a firm pedal.
Air still trapped in the system
The number-one cause is simply that not all the air came out. Air loves to hide at high points - in the calipers, the ABS unit, or a looped section of line - and one bubble keeps the pedal soft. Re-bleed carefully, tapping the calipers and working the correct sequence - see brake bleeding order and brake bleeding basics.
Wrong bleed order or method
Bleeding in the wrong sequence, or letting the reservoir run dry mid-bleed and pulling in fresh air, undoes your work. Gravity bleeding alone often cannot clear stubborn air - see gravity bleeding. Finish with a proper two-person pedal-pump or a pressure/vacuum bleed, and keep the reservoir topped up the whole time.
Air trapped in the ABS unit
On many cars, air caught inside the ABS modulator will not come out with a normal bleed - it needs a scan tool to cycle the ABS pump while bleeding. If the pedal stays soft after a thorough manual bleed and everything else checks out, trapped ABS air is a likely culprit.
Rule out non-air causes
If bleeding truly does not firm it up, look beyond air: a failing master cylinder that bypasses internally, a swollen brake hose, or a leak - see spongy pedal causes. Fix the root cause, use fresh fluid, and keep quality pads and hardware in good order.