Postcard advertising is a great way to advertise as it is easily read and understood due to the message being right there in front of you and not needing to be opened. Postcards are used in advertising as an alternative to or complementary addition to other print advertising such as catalogues and flyers. They have the advantage of being relatively low cost and can be printed and left at a range of different locations for potential customers to take or can be used as part of a direct mail campaign.