[auto_illiterate]

Hey There Everyone,
I am a newbie and I am also a newbie when it comes to cars. I was wondering if anyone can advise me if I truly need a rear track bar/sway bar I think that is what it is called. My car is a V6 and I helped tow someone out of the snow and now this track bar is bent. Do I need to replace it ...do I need to replace it immediately...is there need for me to be sweating this? I will thank all sincerely now in advance .
Kind Regards,
Lee