In “where do you want your ads to appear?,” you can select if you want your ads to appear exclusively throughout your region based on the default region in your Microsoft account configuration, or in all available countries and regions. You can also choose specific target regions by checking the “let me choose specific locations” option.
Lastly, you can select “who should see your ads?”. You can select to show your ads only to “people in your targeted locations” or to “people searching or viewing pages about your targeted locations.” You can also select even distribution by checking both options. Now, click on “save and continue to the next step”.