While boasting about your accomplishments may be frowned upon in most circumstances, it's perfectly acceptable during a job interview, says interview coach and HR expert Barry Drexler.
However, many applicants make the mistake of being far too modest in an interview, Drexler tells CNBC Make It. This is problematic because the purpose of an interview is to sell yourself and highlight your accomplishments. As a matter of fact, he says that being too modest makes you easily forgettable and lowers your chances of getting hired.
"Modesty is a virtue, but not in an interview," says Drexler.
How you were raised plays a big part in your level of modesty, says Drexler, who has conducted more than 10,000 interviews. He says he's dealt with candidates who are "painfully modest because it was beaten into their heads not to be boastful."
"They struggle a lot because they think that's the opposite of what you should do," says Drexler. "They say, 'It sounds arrogant if I say that I'm great.' No it doesn't."
To the contrary, interviewers expect you to speak highly of yourself, he says.
The HR expert adds that another reason people have a hard time selling themselves is because that's not something people generally do in daily life. "You don't walk around selling yourself everyday, saying look at me, look at me, I've done this, I've done that," he says. "So no one has that expertise."