What is data quality, and why is it important for organizations that rely on accurate and reliable data for decision-making? How do characteristics like accuracy, completeness, consistency, timeliness, and validity define high-quality data? What are common issues that affect data quality, such as missing values, duplicates, or errors in data entry? What methods and tools are used to assess, maintain, and improve data quality in databases and data pipelines? How does ensuring good data quality impact analytics, reporting, and overall business performance?