Targeting by operating system Summary Targeting by Operating System allows you to receive traffic from specific users who have targeted operational systems. Before You Begin Role: Advertiser Required information: selected operating systems Estimated time: 1 minute Steps On the campaign creation page, locate the Targeting section and the User OS block. Select one or more operating systems from the dropdown list. Select one or more operating systems. Information: Use All Desktop OS to target all desktop operating systems. Use All Mobile OS to target all mobile operating systems. Troubleshooting Issue: Selected operating systems are not receiving traffic Solution: Verify that the campaign status is Active. Check your bid amount. Make sure traffic is available for the selected operating systems. Review other targeting restrictions such as countries, browser, or whitelist settings. Related Targeting by browser Traffic volume and bid recommendations Targeting by country