Referral

Referral is GA4's channel for visits that arrive through a link on another website. When someone clicks from a blog, directory, partner site, or forum, GA4 reads the referring domain and files the session here — with the source named, so you can see exactly which other sites are sending people your way.

Why it matters

Referral is your map of who's linking to you and whether those links bring real visitors. A mention in a respected newsletter or a listing in an industry directory shows up here. For a small business, the referral report answers a question that's otherwise invisible: which relationships, citations, and partnerships are actually driving traffic — and which are decorative.

A concrete example

You guest-post on a partner's blog and link back to your services page. Over the next two weeks GA4's referral channel shows partnerblog.com as a source with 64 sessions, a 70% engagement rate, and 4 key events. That's concrete proof the collaboration paid off — and a signal that more posts on that site might be worth your time.

The common misreading

The mistake is celebrating a sudden referral spike without asking where it came from. A clean spike from one reputable domain is good news. A spike from an unfamiliar source with 0-second sessions is usually spam or a bot, not an audience. And visits from your own subdomains can show up as self-referral, inflating the number. Read referral by source, never as a single total.