If you find out there is an advertising fee in your car's price, tell the dealer to remove it. You don't need to pay this fee. If the salesperson is unwilling to work with you on this, inform them that you will take your business elsewhere. They will change their minds in a heartbeat!
Now you know what to search for when purchasing a car. The next step is researching the right car for you. Don't make a purchase that you're not sure about, and utilize the tips you've read to help you.