On what sites do you post your referral link and invite a lot?

I have the same confusion about that question .i can't find a good way to develop my underline work .yesterday ,i spent a lot of time to ref one of my net friends to join me .i told him step by step .finnally ,he was successful to join the my lot .what 's more ,he said he never believed the person on internet is a kind man .after seeing what i taught him ,he changed his mind .and he said i was a kind and patient girl .i am concerned about what i did for him .