There are millions of resumes being uploaded to job sites and because of this job sites have an ongoing need for more and more web servers. Job sites earn revenue from recruiters and employers that are subscribers and not from job seekers so it makes sense to eliminate this cost and pass it on to the resume website provider. Since people manage multiple resumes in their profiles to apply for different jobs it would be better for everyone if job seekers had multiple links to different resume pages instead of resume PDFs. The storage cost to job sites is eliminated and job sites can reduce their fees to subscribers.
Functional format is best for those who are switching their career or have large employment gaps on their resume. In this format, you dont have to list the joining or resigning dates of the previous employments. Functional format will hide your employment gaps or your job switching.
An attractive resume template/outline makes it more powerful. Just as dressing smartly helps a candidate in an interview good formatting does the same for a resume. Looks do matter at all places in the real world and on paper. When you present yourself well you get noticed. Similarly when you present a good resume it will be noticed; otherwise it would be very easily find a bin to rest in.
Instead resume writing services suggest you use a summary paragraph which will include a brief objective component to focus your resume. Yet the summary portion will mostly cover your career highlights capabilities and strongest most in-demand skills.
Functional resumes are good when you have little to zero work experience (or new grads). This type of resume allows you to showcase skills that fit in with the job requirements. Fair warning: most recruiters and hiring managers dont like this format and feel as though you may be hiding something. If you have a chronological resume you do not want to have one part chronological and one part functional because it will throw off the entire formatting and may confuse the employer about your skill set.