eSIM is a digital SIM card that allows you to access mobile networks while traveling abroad without having to physically swap out a physical SIM card. Instead, you can simply download the eSIM profile onto your compatible device, such as a smartphone or tablet, and connect to a local mobile network. This can be a convenient option for travelers who want to avoid the hassle of finding a local SIM card and dealing with the logistics of changing it out. With eSIM, you can typically purchase data plans for the specific countries you'll be visiting, allowing you to stay connected while abroad without incurring high roaming charges.