One of them is the thank-you email after an interview, which goes a long way into sealing the deal and making you memorable. This is often an email that many candidates overlook, but a thoughtfully written email can help you maintain the professionalism you showed during the interview and also give you a second shot at highlighting some key takeaways from your conversation.
The significance of the subject line
You are constrained to write professionally because of the tone you are using to communicate with a future employer Your subject line makes them grateful to have you an time-respecting asset. No slang, smiley faces or overly casual language.
This touch not only sets your thank-you note apart from the dozens or hundreds of others on their desk (seriously, they are receiving that many) but it also makes it easy for the employer to remember which conversation was with you.
Role or Interview mentioned
To avoid any mix-up in the future, always add a position title or the conversation that you had just now. This means that the recipient can easily remember your email when they see it in context. It can make an even bigger difference if the company is hiring for several roles, as it specifies more which position you are referencing.
Add a personal touch
While it is important to keep the subject line short, you can also include a quick personal note in the body of your email.
Steer Clear Of Overformalisation And Ambiguity
It balances between seriousness and friendliness. A subject line such as “Thank You” could appear too generic, and some thing like this one that is overly proper including “deep Gratitude for our communication at these days formal assembly” should experience manner to stuffy. Be polite but casual
Best practice is to actually send the thank-you email within 24 hours after meeting with you. That way the recruiter would have your conversation fresh in mind.
With the subject line being a short text, it might be very tempting to inflate it with all the details needed, but you should avoid that. You should ideally keep your subject line to less than 50 characters as beyond that only some of it may get displayed on a mobile. The name of the game: thank you , reference to the call and make it easy for them to remember who is emailing them.

Proofread before sending
Finally, as a rule of thumb: always proof-read your subject line (and your email body) at least twice before click “send”. Making a mistake on a thank-you note takes away from the professional image you are trying to portray. Proofreading indicates that you care about the smallest of details, something which many hiring managers appreciate.
The small things matter and yes, the subject in your thank-you email after interview is one of those important details that will help make sure your follow-up on your submission stands out. This is your one chance to make great professional first impression, so making sure you submit professional, concise, relevant subject line can contribute a long way for everybody. The importance of a personalized follow-up cannot be overstated; it might make the difference between you getting hired or not.