What does it mean to lead a helping hand?

Lend a helping hand to those in need of rebuilding their homes.
Lend a helping hand to those who need to teach new skills to.
Lend a helping hand to those who are lonely or left alone.
Lend a helping hand to those in need of a shoulder to lean on.
The ways to lend a helping hand are too numerous to list as you can tell I could go on and on but check the web site below for more info.

Are you asking the meaning of 'lending' a helping hand instead?

If so, 'lend a helping hand' means to give someone some help, yet not necessarily with the hands. Helping an old man to cross a street is a good attempt. Isn't it?