Quoting L☣J[dgaf]:" I'm buying a double jogging stroller from a lady later for a great deal, but she said the front wheel ... [snip!] ... wheel doesn't swivel? Is "fixed". I know nothing about jogging strollers, is that a common thing with them? How do you turn?"
Fixed front wheel serves well for serious runner and tight routine exercise, while swivel is better for light jogging, and shopping in between (easier steering on the aisles and curvy turning). But And not all stroller is typically like that. So, it really depends on what kind of stroller that you really need.