• Coding errors
• Server crashes
• Service provider issues
• Maintenance
• Hackers
• Traffic overload
• Payment issues
• Expired hosting or domain name

• No hosting is 100% uptime
• Closer to 100% cost goes up exponentially

Uptime Monitors

• Jetpack Monitor - Free
• Uptime Robot - Free & Paid
• Pingdom - Paid
• Make your own

1. Domain renewal issues
Easily avoidable

• Manually renew domain 1 year prior to automatic renewal
• Prepay credit with domain provider

2. DNS outages
Easily avoidable

• Domain providers typically include free DNS.
  Don't use them.
• Pay for premium DNS.

3. Live code changes
Easily avoidable

• Use local development sites.
• Use staging sites.