The plugin allows you to extract parts of a model to a separate IFC file. You can export selected (visible / active) elements of the IFC model to a new IFC file. Additional tools of this plugin allow hiding all non-facade elements (Show only facades), as well as exporting all storeys of the model to separate IFC files (Separate storeys).
IFC Split makes it easier to work on a large model and allows you to focus only on a selected part of it. Smaller files are easier and faster to use, which speeds up your work and allows you to focus on the implementation of the project on the selected work section.