After a year of campaigns the email library is long. Categories group it, so someone looking for last spring's promotion to copy can actually find it.
Setting them up
Open Email Categories and add the groups you want. Name them after the kind of email — Newsletters, Promotions, Announcements, Events — rather than after a year, which dates instantly.
Keep the list short
Five or six categories is plenty. The point is to cut a long list down to a browsable one; twenty categories just moves the problem.
NAMING MATTERS MORE THAN FILING
An email called "Spring promotion 2027 — final" is findable whatever category it is in. One called "Copy of copy of email" is not. Name emails as you save them.