The phrase "avoidable mistakes" means errors that could have been prevented or stopped from happening if proper actions or precautions were taken. Full definition
Whether it's poorly written resumes, or making avoidable mistakes in an interview, recruiters all have their pet peeves when it comes to candidates, and time after time candidates make silly mistakes that cost them an interview or even the role. (careerdigital.com)
Errors as well as avoidable mistakes in your resume will give your employer a dissenting view about you. (grandresume.com)
Guccifer 2.0, a notorious hacker known for leaking DNC emails, was outed as a Russian intelligence officer by an easily avoidable mistake with his VPN. (ibtimes.com)