TTL (Time to Live) is like an expiration timer for information on the internet. It tells servers how long to store certain data before checking for updates.
For example, when you visit a website, your computer saves some details (like the website’s address) to load it faster next time. TTL decides how long that saved data stays before it gets refreshed. If TTL is short, updates happen more quickly. If it’s long, the data stays the same for a longer time, which can make things load faster but may delay changes.
In short, TTL helps balance speed and accuracy on the internet!