Digitization is a step that the world's libraries have been developing and applying for twenty years in order to provide users with digital materials, protect valuable materials, and keep up with the digital society that they have something to offer. Education and science can really take advantage of the offer of digital libraries that have no working hours, location or restrictions, but the user needs technology and the Internet. Digital libraries should be developing organically with society, both in the needs of users and in the active task of preserving cultural heritage. In order to reach new users and retain existing ones, they must have a good range of services, communication with users, effective simple search option, retrieving material and a good visual identity. In Croatia, the concept of a good digital library is the largest library, which is NSK, which offers a lot of valuable material that enriches and nurtures Croatian cultural heritage. A total of 68,730 records of originally digital and digitized materials are available in the NSK Digital Collection system. There is room for improvement, so the Digital Collection Portal can be improved. One of the aspects is a better visual identity, reliability of the system and communication with users, which would introduce them even more into the Digital Library 2.0. Progress should be accompanied by a clear legal framework and funding from the state.