Last Updated: May 2026
This page explains how to opt out of the use of cookies and mobile advertising identifiers for interest-based advertising and cross-device targeting. Please follow the instructions below to opt out.
Please note that opting out of interest-based advertising and cross-device targeting does not mean you will no longer receive online advertising. It means that PubMatic will no longer use the opted-out browser or device to deliver ads tailored to your preferences and usage patterns.
Opting Out of Interest-Based Advertising from Cookies
If you would like to opt out of PubMatic’s services collecting information via cookies about your internet visits for interest-based advertising purposes, please use the opt-out option provided in the interface below.
This right is also provided under California privacy law.
To opt out, please click the “Opt-Out” button in the tool below.
When you opt out, an opt-out cookie will be stored in your browser. Please note the following important information:
- The opt-out applies only to the specific browser and device where it is set.
- To opt out on other browsers or devices, you must repeat the process on each browser and device.
- If your browser blocks cookies (including third-party cookies), the opt-out may not function properly.
- If you delete or reset your cookies, your opt-out cookie will be removed and you will need to opt out again. You may download a browser extension to help preserve your opt-out preferences by visiting www.aboutads.info/PMC .
You can check your current opt-out status using the tool above.
If you opt out and later change your mind, you may opt back in using the same tool.
For more information about how PubMatic uses cookies, please see our Website Cookie Policy and Platform Cookie Policy.
For more information about cookies, including how to manage and delete them, visit http://www.allaboutcookies.org .
Please note that clearing your browser cache alone does not opt you out of interest-based advertising.
Some of our publisher clients maintain their own opt-out mechanisms. If you no longer wish to receive targeted advertising from a particular company or from multiple companies, you should review their privacy policies for additional opt-out options.
Opting Out of Interest-Based Advertising for Mobile Advertising Identifiers
Our clients and partners may display interest-based advertising in mobile applications based on your use of apps over time and across non-affiliated apps.
To learn more about these practices and how to opt out, please visit http://www.aboutads.info/appchoices , download the Digital Advertising Alliance’s AppChoices mobile app, and follow the instructions provided in the app.
Opting Out of Cross-Device Targeting
In some cases, our clients and partners may link information collected from one browser or device (such as a laptop browser) with information collected from another browser or device (such as a mobile phone) to provide interest-based advertising across those devices. This is known as cross-device targeting.
If you opt out of interest-based advertising on a particular browser or device, information collected from that browser or device will not be used for cross-device advertising.
Because cross-device targeting relies on information collected from each browser and device, you must opt out separately on each browser and mobile device you use. This includes:
- Opting out of cookie-based advertising on each browser; and
- Opting out of mobile advertising identifiers on each mobile device.
If you do not opt out on a specific browser or device, information collected from that browser or device may still be used for advertising purposes.
If you have questions about this page or your privacy choices, please refer to our Privacy Policy for additional information.