There might be a better name than "analytics dropoff", but I'm brand new to this, and that's the best I can come up with.
There's this similar question, but it seems AdWords specific, and not nearly as big of a problem as I'm seeing.
I'm running my first PPC campaign, and it's on Twitter. Picking a random recent day, on June 7th, Twitter claims they had 1,305 clicks.
According to GA4, I had 615 Views (but apparently this counts views of multiple pages), and 459 Entrances.
What's going on with this drop-off in reported numbers? Is it normal to see ~ 65% fewer visitors in GA than in an ad platform? Is "entrances" the wrong thing to measure in GA4, are 65% of twitter clicks bots, or there is some other cause I haven't though of.
How do I diagnose this discrepancy in numbers, and what's the right way to determine traffic from a PPC campaign?