The advanced category mappings apply to the warehouses that have "Tags" and "Properties" visible on it's tree.
A category can be selected and then, additionally, by pressing and holding the "ctrl" key on the keyboard, a Tag can be selected as well.
This creates a mapping rule: map products that have both, a given category and a given tag , to the given shop's category.
For example we could select the category "Wallpapers" and (by holding "ctrl") the tag "3D" and map it to a shop category named "3D wallpapers".
The "Properties" work in a similar way. For example we could pick "Wallpapers" and color property "White" and map it to a shop category named "White wallpapers".
A mapping containing all the three: category-tag-property also would work - "White 3D wallpapers".
If you have any questions feel free to contact us or post it in the comments below.