The main reasons they differ
| Reason | Google Ads | Google Analytics |
|---|---|---|
| Date of the conversion | Day of the ad click | Day the conversion happened |
| Who gets credit | Only Google ad clicks | Every channel, paid and organic |
| Counting | Often once per click for leads | Can count every event |
| Window | 1 to 90 days, set per action | Its own lookback window |
Clicks vs sessions
Clicks and sessions measure different things. A person can click twice and start one session, or click and leave before the page loads. Consent banners and blockers also stop Analytics from recording some visits that Google Ads still counts as clicks.
How to compare fairly
- Use the "by conv. time" columns in Google Ads when matching dates.
- Compare the same conversion action in both tools.
- Look at the same date range and time zone.
- Expect a gap and watch whether it stays steady.
A steady gap is normal. A gap that jumps suddenly usually means a tag broke or a setting changed.
Which one to trust
Use Google Ads numbers to manage Google Ads, since bidding runs on them. Use Analytics to compare channels. Use your CRM to count real leads and sales, the number that pays the bills.
Good example. An agency reports Ads conversions for campaign decisions and CRM leads as the headline number. It explains the gap once and tracks it.
Bad example. An owner sees 40 conversions in Ads and 28 in Analytics and assumes the agency inflated results. Nobody explains the difference.
Read what attribution in ads is. Our PPC management explains every number in our reports.