Letterbox Marketing is any form of advertising material that comes through the letterboxes (leaflets, brochures, letters) of a carefully selected area.
Similar to sampling is fixed distribution (in the streets, at cross streets, at the entrances of shopping centers).
Door Hanger distribution is the most efficient method of non-addressed distribution, because it makes sure that the message will not pass unnoticed.
Sampling is the activity that gives consumers the opportunity to try a product for free. This action usually accompanies the launch or re-launch of certain products.
For the success of a letterbox marketing campaign it is vital to identify those areas with the greatest potential for each company and each promoted product.