You can delete products from your SI catalog individually, or you can delete multiple products at one time using the Delete button.
To delete multiple products at once, select multiple products in the grid by holding down Shift (to select a series) or Ctrl (to select outside of a series).
There is no "undo" in SI. Once deleted, these products can not be recovered unless you restore a backup of your SI Server.
Delete Manufacturer
Deleting a manufacturer will delete all products from your catalog assigned to the manufacturer.
Delete Category
Deleting a category will delete all products from your catalog assigned to the category.