How do I stop my dog from barking at people & Cani when we take a walk?

Correct him every time he barks. He needs to know that is a rule. No barking when te are talking to someone. Correct him ! Let him know what te want.

just tell him to sit and if he does not bark while the other Cani pass y ou can give him a treat!

So does te dog walk ahead of te , besides te o behind te ?
te have 2 options :-
1)get a choke chain o a slip leash ,every time he barks at someone pull the leash to the side (not the back) , the pull of the leash will let him know that te don't like that behaviour .
Never try to give affection to your dog (as we do to humans) when he is barking , whinning , biting , jumping on te , etc. Coz for the dog it means that te are appriciating that state of mind .
it will take time , but its effective .