Why are marketing conversions unreliable?

Your dashboard says you got 100 conversions last month. Your CRM says 127. Google says 89. Who's lying? Plot twist: they all are.

The tracking infrastructure is crumbling

Conversion tracking was built on cookies, pixels, and the assumption that users wanted to be followed around the internet. That assumption aged poorly.

Ad blockers now sit on roughly 30% of browsers. Privacy regulations like GDPR require consent — and up to 40% of users say "no thanks." Apple's iOS updates stifled cross-app tracking.

Third-party cookies are on life support. And every time a user switches from phone to laptop to tablet, they become three different people in your analytics.

Your tracking pixel fires when it can. But "when it can" is increasingly "when it feels like it."

Everyone's taking credit

Here's the dirty secret: every ad platform is incentivized to over-report conversions. Google wants credit. Meta wants credit. TikTok wants credit. And if someone saw an ad on all three platforms before buying, guess what? All three claim that conversion.

Add in attribution model chaos — last-click versus first-click versus linear versus data-driven — and you've got a recipe for numbers that don't reconcile. Your Google Ads account uses one attribution window, your analytics platform uses another, and your CRM is counting something else entirely. You're comparing apples to oranges to something that might be a pear.

Example

A prospect clicks your LinkedIn ad Monday. Browses your site on their phone Tuesday but doesn't convert. Googles your brand Thursday on their work laptop — with an ad blocker — and buys. LinkedIn claims it. Google claims it. Your pixel caught nothing. Your CFO wants answers you don't have.

Takeaway

Conversions aren't facts — they're estimates, and the infrastructure behind them is getting less reliable every year.