Doesnt do anything,
Shared radius:is just the range you would share the exp of the unit you killed with your hero.
Shared Fraction: How much of your exp you gained will be shared in your radius.
Share Filters: WHo to share to.
These fields do not actually enable sharing of exp, just the unit that the hero killed. If a non hero unit kills, the hero wont recieve any exp. Please explain further what you mean.