What does MarketplaceService.Prompt?PurchaseFinished do and How Do i get it to work

local MarketplaceService = game:GetService("MarketplaceService")
 
MarketplaceService.PromptPurchaseFinished:Connect(function(player, assetId, isPurchased)
	if isPurchased then
		print(player.Name .. " bought an item with AssetID: " .. assetId)
	else
		print(player.Name .. " didn't buy an item with AssetID: " .. assetId)
	end
end)

I have this code in a script in serverscriptstorage but it wont print anything for some reason

It probably won't print anything because it's in ServerStorage. Put it somewhere else like ServerScriptStorage. Also, in the code that you gave, you did not prompt a player the gamepass. I'm pretty new to MarketPlaceService, so I might be wrong.