How Online marketing is better than traditional marketing

Traditional marketing usually doesn't ensure a sales conversion. An advertisement about your Restaurant doesn't possibly mean they will be visiting your restaurant . Only thing is, the consumer is being aware of your restaurant. On Online environment the user is just a click away from your restaurant. You can offer them a limited period coupon or other loyalty products which ensures that they will visit your restaurant sooner. 
For example, you can have attractive combo offers that engages your restaurant on their social profile such as  buy facebook likes to get 20% off on your next meal order.