In the context of DNS, TTL determines how long a DNS record remains valid before being refreshed

https://easydns.com/blog/2024/10/24/what-does-ttl-mean-in-dns/

In the context of DNS, TTL determines how long a DNS record remains valid before being refreshed. This setting impacts website loading speed and resource usage, balancing between up-to-date information and caching efficiency for improved performance