New vs Returning Users

New versus Returning splits your users into first-time visitors and people GA4 has seen before.

GA4 assigns the label using its own signals, mainly a device identifier, a signed-in user ID, or a first-party cookie. New means this is the first session GA4 has recorded for that person; Returning means it has matched them to an earlier visit. You use the split to see how much of your traffic is acquisition versus how much is people coming back.

Of 1,000 active users this week, 650 are new and 350 are returning. That tells you the site is pulling fresh traffic but a third of your audience already knew you and came back, which is a different story than 900 new and 100 returning would tell.

The returning count depends on cookies and identity, so it undercounts more than people assume. Someone who clears cookies, switches from phone to laptop, or blocks tracking gets logged as new every time. Without GA4 signals or a user ID stitching those visits together, your returning number is a floor, not the truth. Read the trend, not the exact figure.

Returning is a floor, because cookies forget.