An eSIM is a SIM card that lives inside your phone as software. There is no tiny plastic card to pop out and no tray to fiddle with. You buy it online, scan a code, and your phone is ready to get online in the Maldives.
Think of it like adding a second phone line that only works for data. Your normal home number stays exactly where it is. The eSIM just gives your phone a way to reach the internet while you are in the Maldives, without paying big roaming bills to your home carrier.
The best part is timing. You can set the whole thing up at home before you fly. When your plane touches down at Velana International Airport near Malé, your phone connects on its own. No shop, no queue, no waiting.