Q: Should I edit the default channel grouping or build a custom one?

Q: Should I edit the default channel grouping or build a custom one?

A: Never touch the default — clone it instead.

— Leave the Default channel group alone; it's used across reports and Google may update its rules. Editing it can reclassify history unexpectedly.
— Build a custom channel group (Admin → Channel groups → Create new channel group) when your paid social or influencer traffic lands in 'Unassigned' or the wrong bucket.
— Tip: custom groups apply retroactively to your whole date range in most reports, so you can fix historical misattribution without re-tagging.

TL;DR: Clone into a custom channel group rather than editing the default. You get retroactive fixes without risking GA4's built-in logic.

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