Pamphlets can contain anything from information on kitchen appliances to medical information and religious treatises. Pamphlets are very important in marketing as they are cheap to produce and can be distributed easily to customers. Pamphlets have also long been an important tool of political protest and political campaigning for similar reasons.
The storage of individual pamphlets requires special consideration because they can be easily crushed or torn when shelved alongside hardcover books. For this reason, they should either be kept in file folders in a file cabinet, or kept in boxes that have approximately the dimensions of a hardcover book and placed vertically on a shelf.
Its modern connotations of a tract concerning a contemporary issue was a product of the heated arguments leading to the English Civil War; this sense appeared in 1642. In some European languages other than English, this secondary connotation, of a disputaceous tract, has come to the fore: compare libelle, from the Latin libellus, denoting a "little book".