As an employer, I noticed during the hiring procedure that most candidates are not aware of different resume formats and lack information about the type of resume they should opt for according to the job requirements. I used to work with a career consultancy company where our team also provides different sorts of resume writing services including linkedin profile services. From my experience, I would suggest everyone should choose the format that suits their situation the most. For example, if you have good working experience then you write your resume in chronological format. Still, if you're a fresh graduate with no experience then you should prepare a resume in functional resume format.