When linking data to the vision, what does the granularity of the data determine?

The size of the dataset in terms of the number of variables $($columns$)$The size of the dataset in terms of number of data points $($rows$)$The information being conveyed by each data point $($e$.$g$.$ in a sales dataset, the granularity can be one sales transaction per row$)$The complexity of the dataset in terms of how many data sources we$$ll be connecting with