Promotional advertising is very effective. It is just getting the information out there for the people to see. The vehicle for getting it out there in a promotional way is through usable items that have your company, brand, slogan, product or idea printed on them. You just hand them out, and let them work. Those who are intrigued or interested in your product, service or idea will seek more information. That is why you only need to put a little information on the promo items to generate interest.
One area where you see these promotional items used a lot is in pharmaceuticals. You will see the logo, the name of the prescription and a little slogan on what it does to help people. Patients who need the medication will ask their doctors about it, and doctors will be familiar with it because of all of the promotional items they have seen it on. Then patients will go and learn more about the medication, and doctors will do further investigation such as reading studies of effectiveness. It all works together to increase awareness and sales.