Facebook today announced that it is asking all app publishers and developers to upgrade to the Audience Network SDK 5.4 and above before March 3, 2020.
Facebook says that the new FAN (Facebook Audience Network) SDK provides access to the newest features, format iterations, improved stability and helps publishers to maximize ad revenue with Audience Network.
Effective March 3, 2020, Facebook will stop ad delivery to old versions of the SDK. Apps that are not up to date with the minimum SDK requirements will therefore see a drop in Audience Network revenue. Facebook is recommending that publishers update to the latest SDKs as soon as possible to avoid impact on ad delivery.