While doing cold emailing, one of the important parts is the 'subject line'. Following are the tips for writing a good subject line:
The number of characters should be around 60
Avoid using click-bait
Do not use spammy words for example: 'apply now'
Avoid using lots of symbols and always spell numbers below 10
Always try A/B testing by using different subject lines
Your subject line should be short and crisp
Always make the subject line about the prospect
Avoid requesting approvals
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