This format is also beneficial when you are hopping your job field. As it is more focused on the skills of the applicant, you can mention your prospective job relevant skills in resume to prove your suitability for the position. If you do not possess the skills required for the applied position, you can frame your current skills to match the requirements of the employer. Functional template will definitely hide your job hopping or employment gaps and gives you the opportunity to grab your dream job.
Functional template is used when the applicant has considerable gaps in his work history. These gaps make a bad impression on employer and hence should be hidden. This format is more focused on the skills rather than the experiences of the applicant.