What are the best practices for email subject lines?

[richardmsmith]

What are the best practices for email subject lines?

[zeus]

There is no practices. You just create a line incentive enough to get clicks.

[smz21]

Descriptive yet to the point in short sentence always work.

[Elly]

Keep Your Audience (and Your Goals) in Mind
Localize and Personalize
Test Keywords and Phrases
Keep It Short and Sweet
Use Groups and Segments
Convey a Sense of Urgency
Offer Value
Use Numbers
Engage With Questions