In Tableau, “LODs” stands for “Level of Detail.” LOD expressions allow you to perform calculations that are independent of the visualization’s level of granularity. They are used to aggregate data at different levels while maintaining a specific level of granularity for calculations.

With LOD expressions, you can compute values at different levels, such as the overall data level, a specific dimension level, or a combination of multiple dimensions. This gives you more control over how you analyze and present data in Tableau.

By using LOD expressions, you can create advanced calculations and visualizations that take into account different levels of data detail. They are particularly useful when dealing with complex aggregations and filtering scenarios.

LOD expressions are an essential feature in Tableau that empowers users to gain deeper insights into their data and create more sophisticated visualizations without being limited by the default level of granularity.