Signage
Signage is everywhere, you see it every single day and usually do not even realise. It shows you which shop to go into, which floor to go up to or which road to travel down to get to your destination. Even something as simple as a house number is a sign.
Signage is one of the most under-rated forms of advertising available to a business, your sign has the biggest impact where it matters, right outside your door. Over the time period the signage will last, it works out as one of the cheapest form of advertising available to a business and entices the people passing by to enter the premises or find their way to where they need to be.