Pod mods have coils built into the cartridge or an interchangeable coil with a plug-and-play mechanism, which means there's a lot less tinkering involved than with a vape pen or box mod kit.
The design means they’re great for use with high-nic juice, due to their smaller battery are also better suited to higher PG liquids (look for 50:50 to 65:35). A lot of the cartridges you get with pods contain nic salts so you can get that higher impact without having to chain vape too.
Their small size and lesser cloud production means they’re perfect for stealth vaping. They fit in your hand and pocket nicely so are ideal for taking with you on the go.
They’re simple to use, with many being manual auto-draw designs so you just inhale to use. Others just have a firing button you press to drag. You don’t need to mess around with wattage settings and the closed systems in particular are very reliable as the cartridges you use for them create a consistent vaping experience.
Pods are incredibly convenient as they’re so small and because of their design you needn’t bring juice everywhere - unless you have an open system and want to refill the cartridge when you’re out.
Many pods are designed for MTL vaping but can be used for DTL as well. Their design and feel make them especially ideal for ex-smokers.