I have a best seller gig but I don’t know about best seller gig.
Please tell me about best seller gig.
It’s just the gig of yours that has sold the most (most orders). If >1 have sold the most it will probably show the one (of those 2) with the most recent sale.
The gig that gets the green banner on your profile page that says, Best Seller is the gig that you sell the most or best. Only you can see which of your gigs is the best seller. No one else can see it.