2.2.6.1.2 Cell Styles
Cell styles specify a set of formatting properties that can be associated with one or more cells. Cell styles provide the following two benefits:
The set of formatting properties in a cell style can be applied to one or more cells in a single operation.
Once a cell style is applied to a cell, subsequent changes to the formatting properties in the cell style can be propagated to the cell automatically.
For example, if it is desired that multiple cells in a sheet share a common set of formatting properties, such as bold font with a blue fill, then cell styles make it convenient to apply this set of formatting, and potentially modify the set later.
A BrtStyle (section 2.4.798) record specifies a friendly name for a cell style.