Our Company

Recently I find a lot of new companies claiming on their websites to be "Leader in Digital Billboards Manufacturing", or to be a "Leading Digital Billboards Supplier". I don't exaclty know how to define a leading company, but I know that they are not: the leader is only one, while here too many companies are claiming the title. And most of them didn't even existed a year ago. What really makes a company a leader in its own field?