Hey. First time advertiser for a tiny campaign I want to run. I’ve chose not to have Automatic Placements, I’ve excluded the Audience Network stuff. I’ve read about ad sizes from the support page and from AdEspresso, but I’m still not sure what I’m supposed to do. Do I have to make tens of different sizes for my ad, upload them all, and let FB detect which size is for every platform? Do I upload one or a bunch of ads and let it crop them? How does this work?
I have Dynamic Creative and Optimize Creative For Each Person both on, if that matters.
Thanks in advance.