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.
Use of such templates will save a lot of your time. You can utilize this time on improving the quality of the details in your CV. It plays an important role in getting you the job interview when you are applying in any reputed education institute. It is important to follow the proper guidelines when writing the resume.