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Data analysis is the process of inspecting, cleansing, transforming, and modeling data with the goal of discovering useful information, drawing conclusions, and supporting decision-making. It involves several techniques and tools that allow users to understand trends, patterns, and insights from data. Common methods include statistical analysis, predictive analytics, and data visualization, which help in interpreting data effectively. By leveraging data analysis, organizations can improve their strategies, enhance performance, and achieve better outcomes.