This comprehensive post provides a handy guide to creating automatic default chart granularity in Tableau. The author, Kasia Gasiewska-Holc introduces the concept of granularity, explaining it as the level of detail or depth of data in a particular set. Her approach involves creating a parameter that sets the default granularity and a calculated field that uses this parameter. She provides a step-by-step guide, complete with screenshots, to illustrate the process. The author asserts that this method is not only effective but also flexible, allowing users to switch between different levels of granularity easily.