How did the photocopier change society?

The photocopier was invented in October 1937 when Chester Carlson came up with the process called electrophotography, which was later called xerography in 1989 – developed from a Greek word that meant “dry writing." In order to further develop xerography, Carlson teamed up with a photo-paper manufacturer in New York that was called Haloid Corporation. Haloid grew over the years into what is today known as the Xerox Corporation. It worked to further improve the process of xerography, coming up with the first automated xerographic machine called Copyflo in 1955. The Copyflo was actually the world’s first office photocopier machine.
The photocopier has helped to automate the process of document reproduction. The processes used to reproduce documents in the pre-xerographic times required expensive supplies. Also, xerography brought with it the ability to use untreated office paper, which lowered total document reproduction costs. Copies of documents could then be sorted or stapled together, for storage purposes.
While copying makes document reproduction more accessible to people, it further enhances frivolous copying and resource wastage. Employees misuse the process by making copies of their personal documents and other non-important items just for the sake of it. This results in paper and ink wastage. Also, because anybody anywhere can make copies at minimal costs, there is increased violation of copyright laws for written texts. Through photocopying, written texts containing company secrets can easily be leaked to outsiders with dire consequences.
The photocopier has also helped to enhance communication by facilitating the growth of the print media. Small groups of people, such as school clubs, can come up with their own internal publications meant to put forth ideas that interest them.
https://www.smithsonianmag.com/history/duplication-nation-3D-printing-rise-180954332/