Continue writing the next sentence.

How to write professional emails
Use the subject line wisely.
Rather than filling the subject with one or two vague terms, let the recipient know up front what they can expect from your email. Otherwise, it might fail to make the impact that it's supposed to.
Be as specific as possible when supplying a subject for the email without becoming overly wordy. " upcoming health inspector visit " is a stronger subject title than just " health inspector " when in doubt, think about what prompted the email in the first place and describe the situation in a few words.