According to me, Your question is "can be keep DTM library file(appmeasurement.js) in our server. It's take some time to load is browser."No, Keeping this file in server will stop DTM to work. The many things will not load like data element, rules and other tools which added in DTM(marketing cloud v...

Deliverability is a term associated with Email and SMS but primarily we can say Email.A1: Email.A2: Text to image ratio, Font size of text.A3: Spam trap hits, Number of recipients that mark your email as spam.Thanks,Darpan.