This paper deals with the presentation of Wikidata, its development, characteristics and main advantages and disadvantages. Wikidata, as part of the Wikimedia Foundation, is one of the projects that provide free access to information. This database is understandable by machines and people because it consists of structured data that are interconnected. The project is a relatively new part of Wikimedia, and its goal is to connect entities into a structured database so that as much information as possible is integrated and access to information is much easier. Precisely when entering data, the information goes through verifiability mechanisms so that conflicts of authors, which do occur, do not occur. With features such as multilingualism, free access and structured data, Wikidata improves sister projects of Wikimedia, such as Wikipedia and Wikimedia Commons, and therefore the mutual influence of Wikidata and Wikipedia is explained in the paper, and the main differences in the projects are emphasized. In addition, structured data in Wikimedia Commons and the need for their creation and connection with Wikidata were explained.