When you sign your ticket, you promise to go to court or pay the fine.
If you don't go to court or pay your fine, your driver's license can be suspended. And you may not be able to renew your car's registration.
The judge can also charge you with "contempt of court" or "failure to pay a fine." If that happens, the court can charge you with a misdemeanor and issue a warrant for your arrest or add an additional fee (called a "civil assessment") of up to $300.