Hello respected members , I came back to fb ads campaigns after long time , and i saw there was no option to upload fb uids to target custom audience in fb ads campaigns. It was showing that we can upload ids of mobile app users. 1-So first thing is i dont even know what is ids of mobile app because i dont have mobile app for my site.So how will i target ids through mobile aps? 2-And 2nd thing , is that mean that all my hard work from the years to collecting fb uids from the 3rd party tools is wasted now ? I cant even target people through fb uids from the pages and groups big list i have ?