This course centers on the Data Quality Assessment (DQA) tool within the LAGO project, which evaluates data quality across multiple formats, including tabular data, images, videos, and annotated datasets. Participants will learn how the tool generates detailed reports and warnings, enabling them to analyze variables, correlations, missing values, and duplicate rows in datasets. It also facilitates comparisons between similar datasets and assessments of image and video quality. By using this tool, learners can ensure a thorough examination of data integrity, ensuring compliance with project requirements.