Sites like Instagram and Twitter, can give potential employers an opportunity to check out who you are outside of your résumé, cover letter, or interview —the good and the bad.
Many employers who check-up on social media profiles said they have found content that has caused them not to hire the job applicant. Some employers said they didn’t offer a job applicant the position because of inappropriate photos and information posted on his or her profile; while some said they chose not to hire someone because of evidence of drinking and/or drug use on his or her online profiles.
Other reasons they decided not to offer the job: the applicant’s profile showed poor communication skills, he or she bad mouthed previous employers, made discriminatory comments related to race, gender, or religion, or lied about qualifications.
So be mindful of what goes on your social networking page, or consider changing your privacy settings.