Create ad units for native
You need to add ad units first if needed. Create an ad unit as you normally would; the difference for native ads is described below. You can also use existing ad units.
- Create an ad unit.
Under “Sizes”, select Fixed size and then select pixel sizes or “Fluid” if you want to enable fluid slots for native ads.For the Android & iOS app code option, you instead select Custom rendering as the ad unit size.
Google Publisher Tags and Fluid sizes: If you're trafficking the "Fluid" size for native ads in the Ad Manager UI, you also need to ensure that the 'fluid' size is added as a valid size in the Google Publisher Tag. For example:
.addSize([640, 480], 'fluid').
Read the GPT reference guide for more information.