The key characteristics of digital libraries are as

(i) Digital libraries encompass electronic (digital) materials as well as traditional print and other media such as audio, video, graphics, and animations

(ii). The physical space required for digital libraries is significantly reduced. 

(iii). Digital libraries curate and manage the information they provide access to, rather than merely pointing users to external sources.

(iv). They facilitate quick and efficient access to a multitude of interconnected information sources.