A Wildcard certificate protects your main domain (e.g. domain.com) and unlimited subdomains (e.g. www.domain.com, shop.domain.com, blog.domain.com) with a single certificate. It is ideal if you have multiple subdomains and want to avoid managing multiple certificates. Available: EssentialSSL Wildcard, PositiveSSL Wildcard, PremiumSSL Wildcard.