If you have many categories or a large categories tree it is extremely difficult to track whether you have added all the products to the necessary categories.
The module helps you to automate this work.
Just link similar categories to the category and products will automatically assign to the specified similar categories.
For example, if you have "Unisex" category and you want assign products to the category "Male" or "Female".
Just add "Man" and "Woman" categories in the similar categories section and products will be automatically transferred there!