What is the meaning of Ephemera?

plural of ephemeron (transitory thing)

Things without long-term durability: transient things.

Manmade objects that are short-lived (under usual conditions), usually because their design intent is to be inexpensively made and thus affordably bought, a goal that often is an engineering trade-off versus durability.

  1. Especially, such ephemera that are collectibles, such as (originally) cheap publications (e.g., pamphlets, brochures), single-use packaging from packaged goods, and giveaway or throwaway trinkets.

    Especially, such ephemera that are collectibles, such as (originally) cheap publications (e.g., pamphlets, brochures), single-use packaging from packaged goods, and giveaway or throwaway trinkets.

    Published single-sheet or single page documents which are meant to be thrown away after one use.

    Transitory audiovisual matter not intended to be retained or preserved.

    Source: wiktionary.org