Generally speaking, your headlines should include:
A key USP
A newsworthy event
A call to action
A discount code, if applicable
Example: Juliet Period Launches a Customisable Monthly Essentials Box — Save 20% With an Exclusive Reader Code
Do:
Include your brand name — it's the strongest driver of acceptance.
Keep it short and write it as a statement, not a question.
Write any discount into the sentence itself, not in brackets at the end.
Avoid over-the-top words like "transform" or "boost", and defensive ones like "proven", "certified" or "guaranteed".
While it's important for a headline to be attention grabbing, be sure to think about what's appealing to both the publishers you're pitching to and their audiences. And always ensure your content is accurate!