According to Marketo®, what is the ideal length for an email subject line?

The ideal length for an email subject line, as indicated by Marketo®, is generally considered to be around 7 words or 41 characters. This length strikes a balance between being concise and informative, allowing enough space to convey the main message or entice the recipient without being excessively long.

Subject lines that are too lengthy may get cut off in email previews, especially on mobile devices, reducing their impact. Moreover, studies indicate that subject lines within this optimal range tend to have higher open rates, as they are succinct yet descriptive enough to pique interest. By keeping the subject line around this length, marketers can effectively communicate the purpose of their email, encouraging recipients to open it and engage with the content inside.