Online databases are organized collections of data that can be accessed via the internet. They store information in a structured format, making it easy for users to search, retrieve, and manage data. Examples of online databases include Google Scholar for academic articles and IMDb for movie information. These databases can be public or private, and they often require a subscription or membership for full access. Users can find various types of information, such as research papers, business records, or medical data, depending on the database's focus. Online databases are essential tools for researchers, students, and professionals.