You are receiving this message because your Google Ads account uses the tracking template field and will be impacted when we begin requiring parallel tracking in all accounts.
Earlier this year, we introduced parallel tracking as an optional feature to improve your landing page speed by sending users directly to your website while all click measurement is processed in the background.
Starting October 30, 2018, parallel tracking will be required for all Search Network and Shopping campaigns on Google Ads, to ensure a better landing page experience for users. At that time, the account opt-in setting will be removed and parallel tracking will become the only click measurement method for Search and Shopping campaigns on Google Ads.
Please work with your click measurement provider(s) to make sure that your account is ready for parallel tracking by October 30, 2018. Should you or your provider miss this deadline, it could potentially interrupt your click measurement reporting or cause landing page errors. If you are already using parallel tracking, you won't need to do anything; you're all set up.
For more information on parallel tracking, please refer to the Google Ads Help Center and contact your click measurement provider. If you have further questions, please reach out to your account team or contact us at any time.