What can a filter variable do beyond the workbook's standard filter capabilities?

A filter variable enhances the functionality of standard workbook filters by enabling more granular control over what data is displayed in a worksheet. Specifically, applying level filtering to a worksheet means that the filter can be based on specific levels of data hierarchies, which allows users to focus on particular subsets of data that meet certain criteria. This targeted filtering capability is beneficial for analyzing complex datasets, as it enables users to drill down or selectively view data that is relevant to their analysis or reporting needs.

In contrast, the other options do not accurately reflect the capabilities of filter variables. While filtering data across multiple workbooks could be valuable, filter variables operate within the context of a single workbook rather than across multiple ones. Restricting access to certain worksheets pertains more to security and user permissions rather than data filtering capabilities, which is not the primary function of a filter variable. Additionally, modifying actual data in a worksheet is outside the scope of what filter variables are designed to do; they only control which data is visible and do not alter the underlying data itself.