Tips on Buying Cars: Ford models, ford models, ford dealer

Question
What's the difference between a ZTS and an S and an SE, etc. etc..  I'm trying to figure out which type of used Ford Focus is right for me, but I have no idea what those different letters mean.

Answer
Hi Jen
I could go into a very long explanation...but your very simple answer is going to a Ford Dealer...simply ask for a brochure on Focus it will state in detail what options comes with diff models...
Every vehicle has got Diff options therefore they become A-B or C...with Diff prices...

I note you mentioned used...find the one you may consider and my expertise is getting you a fair deal
Ray