Thank You,

If there’s a duplication issue, you’ll see it in your Events Manager and get warnings about it. If you have web API set up, most will deduplicate for you — particularly if through the API Gateway.

Like I said, you will have Meta taking credit for conversions that Google may also take credit for and vice versa. Both conceivably contributed. Whether that matters or not is up to you. But you’ll most likely be frustrated by the lack of clear-cut answers one what fully deserves credit because you’re just not going to get that. And really, there are often multiple sources that could contribute to every conversion you get. The main thing to understand is how Meta counts them (or other platforms count them).

Hello Jon, i am still waiting for your response.

Thank you :), I appreciate your help, just want to clear we are retargeting the website visitors through Facebook, Facebook uses the probabilistic model to measure conversions so whenever a customer converts even through another channel because the customer gets engaged with Facebook ad it got converted later, on another channel Facebook takes credit of it. is it possible? Also, I did some research and found if we do have set up both facebook pixels and conversion API, it could result in duplicate conversions. is it correct too?

These will never match up because they report conversions differently and have access to unique data. Ads Manager default conversion reporting is 7-day click and 1-day view. Depending on the product, it’s possible most of your conversions do not result in a direct line (click ad and immediately purchase). They may click and come back up to seven days later — and may not use that original UTM-tagged URL. Or it may be view-through, which means they never clicked at all. That could be because they later Googled or went directly to the site within a day or are part of email campaigns.