I don't believe you've asked- I think I've only told a handful of people here.

A warframe is a techno-organic 'suit' is maybe the most intuitive way to explain it, although we don't wear them. [ Well, they didn't use to. ] We connect to them through an energy called Transference that's made possible through our connection to the Void.

As you've probably gathered from the name, their purpose tends to be rather singular.