subject line

Message preview text

The subject line is the brief text identifying an email's topic, displayed before the message is opened.

It functions like a headline, helping recipients decide whether to read, ignore, or delete: Your subject line should grab attention.

In email marketing, subject lines are crafted carefully to boost open rates.

The term extends to similar headers in other messaging systems.

Related

letter · summary · brevity · clarity · character limit · emotional appeal · preview · personalization · reply · read receipt · first impression · attention grabbing · header · spam · tone · draft · truncation · too long

Categories
Opposites
message component

subject linebody

Physical structure, living thing

body text · content · body copy · attachment · signature

information density

subject linefull text

Complete original wording

elaboration

Family

line, subject, linen, lineage, inject, subjects, subjective, subjugate, subjection

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G