A business of no sign is a sign of no business. Invest in creative advertising to stay ahead of your competitors. Others would say that it is costly and not necessary. But if your competitors are advertising, then you should, by all means, advertise too.
Advertising promotes your product and makes it known to more people. Successfully reach your target consumers by using creative advertising. You will spend money to make it happen but you’ll see it is worthwhile when the profits start coming in.