To obtain the Google Ad Exchange feature, you need to meet the requirements and go through the process set by Google. Here are the general steps you need to follow:

1. Meet the qualifications: Google Ad Exchange is more focused on publishers than advertisers. So, to use Ad Exchange, you need to have a website that meets Google’s requirements regarding quality, content policies, and legal compliance. Ensure your website complies with Google AdSense guidelines and Google Ad Exchange policies.
2. Become a Google AdSense publisher: Google Ad Exchange requires involvement through Google AdSense. Therefore, the first step is to sign up and become a publisher in Google AdSense. You need to go through the registration process and agree to Google’s terms for publishers.
3. Meet traffic and quality requirements: Google Ad Exchange generally has higher traffic requirements compared to the regular Google AdSense program. Ensure your website has sufficient traffic volume and high-quality content to meet Ad Exchange’s requirements.
4. Connect Ad Exchange with AdSense: Once you become a Google AdSense publisher, you can apply to link your AdSense account with Ad Exchange. This is done through the AdSense interface under “Settings” or “Account Management.”
5. Go through the approval process: Google will review your application and go through the approval process. The final decision rests with Google, and they will consider factors such as the quality of your website, policy compliance, and other relevant factors in their evaluation.

It’s important to note that each application will be evaluated individually, and the final decision is entirely at the discretion of Google. If your application is approved, you will be granted access to the Google Ad Exchange feature and can start using the platform for digital ad transactions.

It is recommended to visit the Google Ad Exchange website and contact the Google AdSense support team for more information on the latest requirements and registration process.