Your question has no singular answer. You might want to first understand what views and impressions are. Have a read of this article:
You can get an order even with just 1 view. This will happen if the first person who visits your gig places an order with you. You can also have thousands of views yet not have a single order. This happens when a lot of Fiverr users visit your gig but do not place an order with you. It boils down to how attractive your gigs are to those who visit them.