In order to sell on Fiverr, people need to find your gig when they search on Fiverr. Let's say you sell copywriting services, when someone who wants to hire a copywriter and search for copywriting services, your copywriting gig needs to appear high on the search results. Clients are likely to buy from the high ranking gigs. Therefore, you need to do SEO on fiver gigs, you need to make your title and description search friendly. You also need to focus on getting five start ratings from buyers as the gigs that get five start ratings get boost on search algorithm.