You can restrict your campaigns to a specific geolocation. Please note that restricting a campaign to a particular geolocation may affect your traffic volume. Follow the guidelines below to restrict the campaigns to a specific geolocation.
Step 1: While creating a campaign jump to "Advanced Options" and click the "GEO" button.
Step 2: By default, all geolocations are preselected to scale traffic volume. To choose specific geolocation, uncheck "All".
Step 3: Now select your desired geolocations by checking them and click Update.
** Note: Most advertisers are looking to drive traffic from Tier 1 countries. So you can locate US and Canada under "North-America", the UK under "Europe", and Australia under "Oceania" continent. **