Open-source intelligence refers to publicly available data and information. It's not only the information that can get through a search engine. It may originate from a variety of sources and is a great tool for security professionals and intelligence agencies, but it's also crucial to remember that threat actors use OSINT to their advantage. Material available to the public does not have to be free; it can also include proprietary or subscription-based information, such as a news journal. It might also be information and data that can only be obtained upon request.