Why is car jerking while driving? on 1997 Volkswagen Jetta

My car recently started to jerk while driving, or like it whats to stall out, but doesn't completely. More like it's choking. What can that be?

2 answers
auto or stick?
Manual or automatiC???!!! dniM reveN....... What speed are you driving , and does it matter if you're on or off the throttle? Last maint. service - what & when?