Wobbly railings along your porch,
deck, or steps are a sign that there's a weak connection between one or more of the posts and the frame. The fix is easy; simply tighten screws or lag bolts in places that don't feel sturdy. Whatever you do, though, don't ignore them. Eventually the loose rail will give in, and you'll be left with a broken section of the structure—and those repairs will be more costly and time-consuming to deal with than merely tuning up a few shaky sections.