How does traffic referrer source function in reports?

The bad tracking is related to the privacy changes with Apple after the IOS 14.5 update almost a year ago. Essentially Apple gave the option to it’s users to opt out of the tracking so essentially you can’t track them how you used to before. Although there are ways around it. We found that Google Analytics doesn’t work that well since it operates on a last-click basis. Meaning, let’s say you’re running a Facebook ad campaign and you want to track the results through UTM links in Google Analytics. Let’s say someone sees your ad, and goes back to search for your brand using Google and buys your product. Before the IOS 14.5 update Facebook could easily attribute this purchase to your ads, but now it can’t. Also Google wouldn’t pick this up as a purchase since it didn’t directly came through an ad, but came back a day later using Google, so you can’t track your purchases accurately this way. I hope this clears some things up haha. Feel free to email me at peter@pk-digitals.com , I’d be happy to chat more about this with you if you want! Cheers!