Time to live (TTL) refers to the amount of time or “hops” that a sent packet can exist inside a network before being discarded.
It determines how long a DNS cache server can serve a DNS record before reaching out to the authoritative DNS server and getting a new copy of the record.
If you are transferring a domain or a web hosting account to Web Hosting Magic, we recommend setting your DNS TTL to a short value (something like 300 seconds will do) 12-24 hrs before the actual migration and eventual DNS changes.