App Service Certificates allows you to Purchase and manage SSL certificates within few minutes. Some of the Key Features include,

• Secure one Web App (root domain and WWW)
• Secure one Web App and all its sub-domains (Wildcard SSL)
• 1 Year validity with auto renewal
• A Domain Validated Certificates (DV) with easy and intuitive validation process
• By default, Certificates secrets are stored in Azure Key Vault
• SHA-2 and 2048-bit encryption – the strongest on the market
• Compatible with all major browsers