What type of services are very famous on fiverr?
Have a look around there are tons of very successful sellers out there.
Graphics & Design Digital Marketing Writing & Translation Video & Animation Music & Audio Programming & Tech Advertising Business Lifestyle Gifts Fun & Bizarre Other
I do not think online work is for you if your first question is this one. Just a hunch.
Graphic designing and photoshop! The gigs i offer are the most common yet highly paid on here.
I think it is a bit of common sense here, digital deliveries are the most common, ard and design work, audio and video editing and programming.
However - I am in a completely different field, spirituality, and it is OK - but of course it could always be better, this just compliments my in life activities on the same field.
All in all - offer where you are any expert at, and you will be successful! Offer something you have no expertise in or passion for and you will not thrive!