Data sources refer to the origins from which data is collected and analyzed. These sources can be categorized into primary and secondary types. Primary data sources include original research, surveys, and experiments, while secondary data sources consist of existing information, such as reports, articles, and databases. Common examples of data sources include government databases, academic journals, and social media platforms. Each source provides unique insights and information, making it essential to choose the right data source for specific research or analysis needs. Understanding the strengths and limitations of each source is crucial for accurate data interpretation.