# 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

1. On the campaign creation page, locate the Targeting section and the User OS block.
2. Select one or more operating systems from the dropdown list.
3. Select one or more operating systems.

![targetting_2_os_v300526.png](https://wiki.dao.ad/uploads/images/gallery/2026-05/scaled-1680-/targetting-2-os-v300526.png)



<p class="callout info">**Information:** Use **All Desktop OS** to target all desktop operating systems. Use **All Mobile OS** to target all mobile operating systems.</p>

##### 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](https://wiki.dao.ad/books/getting-started/page/targeting-by-browser "Targeting by browser")
- [Traffic volume and bid recommendations](https://dao.ad/en/traffic-volumes)
- [Targeting by country](https://wiki.dao.ad/books/getting-started/page/targeting-by-country "Targeting by country")