101 Best Email Subject Lines of 2017 - 0 views
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The primary reason we’ve seen our best open rate climb ever upwards has been an ever-increasing focus on list hygiene.
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It’s natural that curiosity-based subject lines would become more powerful as the inbox gets more crowded.
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Scarcity, on the other hand, is a powerful tool but is best used conservatively as its impact diminishes the more it’s put into play. And while scarcity is a great driver of sales, it is often less effective at driving your overall open rate up.
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