you could use the 'smoother' (window>smoother), but that is destructive (it changes the keyframe values) so you'd want to duplicate what you have and apply the smoother to the duplicate.
you can also use an expression function called smooth() on the keyframed property (i assume position in this case), and the function is not destructive, so you can modify it or remove it as needed and you'll always be able to revert to the original values.
the expression is very simple: smooth(width = .5, samples = 5)
the width value is in seconds, it tell the expression how far before and after the current time to average. and samples is number of keyframes values to average. modify those as needed to smooth your values.