To View categories,

1. Go to the Magento 2 Admin panel.
2. On the left navigation bar, click the Zalando Integration menu.
   The menu appears as shown in the following figure:
   
3. Click on Categories.
   The Manage Categories page appears as shown below:
   
4. The category details will be displayed in the grid.
5. To fetch new categories, click on the Fetch Categories button. The categories will be fetched and displayed in the grid.
6. To fetch the Attribute Data, select all categories then do the mass action of Attribute Sync to synchronise all attributes data for that category.
   
7. To delete the categories, click on the Truncate button. The selected categories will be deleted.