A leak test checks IP, DNS, and WebRTC behavior to confirm traffic stays inside the VPN Tunnel. If a feature sounds vague in marketing, look for measurable signals: audits, documentation, and testable settings. Remember that privacy is layered—pair VPN use with browser hygiene (separate profiles, limited extensions, and updated software). For business users, clear policy and least-privilege access reduce risk more than ‘always route everything everywhere.’ VPN Surf and Elite VPN guidance aims to keep the concept actionable, not just theoretical.