A TTL (Time To Live) is a setting on a DNS record that tells other computers on the Internet how long they should remember that record before checking for updates.
These are standard defaults and work well for most setups.
Intentionally lowering DNS record TTL values before making changes can reduce propagation delays by causing DNS caches to refresh more frequently allowing most users to see updated DNS information sooner. For best results, lower TTL values at least one day before a planned migration. Some users may still experience brief delays due to caching by ISPs, networks, or devices.
Learn how to reduce TTL values
Low TTLs help DNS changes take effect quickly, but once a migration is complete they provide little benefit. Returning to standard TTL values reduces DNS traffic, improves caching efficiency, and can make services more resilient to temporary DNS outages.