Doing any course on Fiverr, does help to improve GIG ranking and sales of relevant topic?
The official word from Fiverr:
Once you complete watching all of the course videos, take all quizzes, and the final exam, a course badge will appear on your seller page. This indicates that you have successfully completed that course. Additionally, after completing a course on Learn, your gigs are likely to gain more visibility in the marketplace and get noticed more.
I haven’t done a Learn course, though, so unfortunately I can’t give you a personal account detailing changes I noticed after earning a course badge.
Yes! They do. I have experienced it and it generally creates more trustful profile and people see your profile and they evaluate according to the certifications and other things we’ve mentioned on our profile.