How does Twitter determine device type for ad targeting?

Twitter determines device type for ad targeting based on the information it receives from the user's device when they access Twitter. This information includes the device's operating system, browser type, and other technical specifications.

When a user visits Twitter on a mobile device, Twitter can identify the device's operating system (iOS or Android) and other device-specific information. This information is then used to categorize the user as a mobile user and make them eligible for device targeting in Twitter Ads.

Similarly, when a user visits Twitter on a desktop or laptop computer, Twitter can identify the device's operating system (Windows, MacOS, Linux, etc.) and other device-specific information. This information is used to categorize the user as a desktop user and make them eligible for device targeting in Twitter Ads.

It's important to note that Twitter's device targeting is based on the device that the user is currently using to access Twitter. If a user switches devices (for example, from a mobile device to a desktop computer), Twitter will update their device information accordingly.

Twitter's device targeting is designed to be as accurate as possible, but it's not foolproof. In some cases, a user's device information may be incorrect or outdated, which could lead to misclassification. However, these cases are likely to be rare and should not significantly impact the effectiveness of device targeting in Twitter Ads.