There are multiple Fiverr gig ranking factors to improve your gigs. Below are a few things that you can keep in mind while creating your gig.
Try to keep your gig unique from others (do not copy others gig)
Keep your gig title simple, easy to understand your work and easy to find
Select correct gig category and sub category for your gig
Use gig tags properly (use negative keywords if needed)
Make unique, eye catching and minimal design gig image
Write well organized gig description (use number or bullet list to make it easy to understand)
Share your gig on social media platforms to reach out peoples our of Fiverr on site searches (it will help to explore more)