It's all a matter of style and consistency. Some choose to capitalize only the first word, e.g. (using your example) The title of this question. Others capitalize the key parts of speech in the title, excluding conjunctions, prepositions, and the like: The Title of T/this Question. In some cases, all the words in the title are capitalized:
How to Reply to Confirm an Interview. When confirming a job interview, type a one-page letter thanking the interviewer for the invitation to the job interview. Confirm the exact time, date and location of the interview to avoid arriving at the wrong location on the wrong day or time. Send the letter within 24 to 48 hours of receiving the invitation. (Creatas Images/Creatas/Getty Images)
She was wondering if she should send another follow-up email asking again for their interview process timeline. She had already sent a follow-up note after the interview that contained questions for her main contact at the company. She wanted to know what the next steps are and when they expect to make a decision. A normal thing to wonder. But, they didnât answer and so she wanted to ask again.