It would be country that need tools to work on agriculture so i would say some country that dont have too much mechanistation and all job is done by animals and humans, If you have horse,it need horseshoe than blacksmith is need for that, than if you have a woodworkers or lumberjacks they will need blacksmtih so ,blacksmith can take care of axe or make drawknife etc.
Than for agriculture i saw in Bosnia that nowdays it still populated to bring plough for potato, there are some left plough that is powerd by tractor but it is navigated by human. And some of agricutural tools are bringed to blacksmith to fix it. In past blacksmith would have to make ring for carrige wheel now it is not that case. It have blacksmithing but that trade is dying here to casue off moderation fof tools and stuffs like hand plane are moderated to electric planer like hand powered grinder is now electric angle grinder everything is done by shortcut. That's why old trades are dying,