The atomiser portion of your device turns e-liquid into vapour and holds a reserve of e-liquid, ready to be vaped. The atomiser can be broken down into two key components: the tank/pod and the coil.
The terms “tank” and “pod” simply refer to the connection design of the atomiser. Typically, a tank uses the industry standard 510 connection, meaning it can be used with any compatible 510 devices. A pod, on the other hand, uses a proprietary connection, meaning it can only be used with the device it was specifically designed for.
Tanks are larger, refillable, and typically made of stainless steel and glass. Pods are usually made of food-grade plastic and can be pre-filled or refillable.