What is electron-withdrawing Power?

[Alex Kashou]

I'm confused what this means exactly? Is electron withdrawing power the ability to pull an electron (aka electronegativity) and how does this make something more stable when it loses a proton?

[Naveed Zaman 1C]

Electron withdrawing power is the ability of the ion of an acid to pull the electrons that it accepts after it gives away a proton. Ions with low electron withdrawing power can't hold easily the extra electrons it accepted, so they are more likely to steal back another proton and revert back to the original acidic compound. Ions with high electron withdrawing power can hold onto those electrons that it receives, so it is more stable and stays as the conjugate base form of the original acid.