It is easier to install an electrical outlet correctly when you use the right box.
Electrical boxes serve as end or transition points for electrical wires. Outlets, light switches, Lights, and ceiling fans are but a few of the devices that are installed in electrical boxes.
While there is an endless variety of sizes and shapes of electrical boxes, all can be divided two camps: plastic or metal electrical boxes.
To confuse matters, your choice of plastic vs. metal is abundantly clear-cut in only a two instances, with other instances being at your discretion.