While many states have online portals that allow citizens to pay traffic tickets without going to court, you will need to go to court if you're disputing the ticket. If you pay for the ticket, you're admitting guilt and allowing the violation to show up on your record, which may or may not be in your best interest. If you hire an attorney, they will appear in court for you.
If you do not pay your ticket or show up for court, the judge can find you guilty, suspend your license, or even issue a warrant for your arrest. Failure to appear in court instead of requesting a new court date is more serious than the initial traffic violation.