GPT(google publisher tag) starts to support lazyload at 2019-02-04(v301), developer can setup lazyload ads easily . But there is no official document doesn't provide the default value, but only some example. We found the value in the code.
- fetchMarginPercent: 800
- renderMarginPercent: 400
- mobileScaling: 3
These values were found in securepubads.g.doubleclick.net/gpt/pubads_impl_2020090201.js?21067391. It might be changed in the future.
