Training your dog to walk well on the lead is very important. If you don't train your dog to walk politely and respectfully on the lead then you will be guaranteed a doggy lifetime of being yanked and dragged around. It all adds up to the dog owner feeling frustrated and the dog being in charge; not a combination that is healthy.
Of course, there are plenty of aids to control a dog when on the lead ie. halties and harnesses, and sometimes it can be trial and error until you find the correct control lead for your dog. By far the best solution is to take some time teaching your dog to walk well on the lead.
Have a look at various techniques on the internet or in books, and decide which one you are going to use. Stick to whatever method you choose, take time to train often, and soon your dog will be trotting nicely by your side. Believe me, it's well worth the effort.