When using the Suitability Modeler in ArcGIS Pro, the criteria must be transformed onto a common scale, and this is done on the Transformation Pane. These transformed criteria are combined to create the suitability map. Unless explicitly set, all these layers are processed as raster functions, which processes raster data in real-time without creating a new file on disk. Instead of writing a new permanent raster, functions are applied "on the fly" as you view the data, which is faster and saves storage space.
However, if you want to use the transformed rasters outside the Suitability Modeler application, you should check the Save transformed dataset when model is run option. This "save" will take place when the Run button on the Suitability tab is clicked. This "Run" operation will also convert the suitability raster function to a raster dataset.
