why is my car having trouble accelerating?

Hi! I have a 2010 Hyundai Elentra with 136,500 miles on it. I’ve noticed recently when accelerating, i’ve been having issues with my car getting up to speed and sputtering. Like if i push down on the gas too fast the RPMS spike and my car does not accelerate so i have to pump the gas a lot when im accelerating. I called my auto shop to get in ASAP but am just curious if anyone knows what might be up??