We have implemented Google analytics, Facebook pixel and now going to including Google ads remarking script to collect browsing behavior data.
One of our concerns is: probable degradation of site speed due to inclusion of js file of each tool ( Google analytics, Facebook pixel , Google ads remarketing etc. as dependency)
Does Google Tag manager helps in that ? Is including, script of just GTM enough ?
I did run preview of GTM and saw network log of browser, it is downloading analytics.js from google and fbevents.js from facebook. That means collection and relaying of events happen at client side.
Need to confirm.