Hi, I would like to target my ads only in my country of business. What I have done to achieve this is excluded some 189 countries from my Adwords account and targeting only one in which I am interest. Can anyone please confirm if it's a good idea? Is there anything else I can do to achieve the same or better? Any help will be much appreciated. Thanks.
You don't need to exclude every country you don't want to target. You are just making more work for yourself and making it more complicated than it needs to be. You just need to include the countries you do want to target. It will still work the way you did it, it's just redundant.
It is a good idea to be specifically targeting only one country, but you don't have to exclude the rest of the countries.