Google announced today that it has finished the rollout of its new AdMob to more than 200 countries and as a result the company will stop accepting apps into Google Play based on its old SDK on August 1st. Following this initiative, the search giant will sunset AdMob’s legacy platform on August 31st. After this, legacy ad units will stop working and the outdated AdMob UI will no longer be accessible.

Mountain View is encouraging developers to upgrade to its new AdMob as soon as possible and is offering guidance to programmers who may be in need of assistance during this transition.

“We also want to remind you that after August 1st, 2014, the Google Play Store will no longer accept apps using the legacy AdMob SDK,” wrote Amy Quispe of Google’s mobile ad relations in recent blog post. “If you’re an Android publisher, you should migrate to Google Play Services as soon as possible. We have plenty of resources for you including our migration guide and intro video – and if you still need help, please ask your technical questions on our forum.”

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