Go to your Settings in the bottom left corner of your screen

Next, select Categories

In the top right corner, select Add New Category

Choose and write the name of your new category, e.g., Audio, then click Add Category

You also have the option of adding subcategories to your newly added category. Click the three dots on the end of the new category line and select Add Subcategory and proceed as you did for your new category

Click on the three dots on the line of your newly added subcategory to add a subcategory. For example, you could make a category: Audio, subcategory: Headphones, subcategory of headphones: Apple Airpods)

Select Items, then click a specific Item

In the header, linger your mouse over the category until the pencil icon appears. Click the pencil to start editing the Category. You can choose a category you created from the dropdown menu. To finish, click Update.

Note that once you select a new category for that item, it will be moved to the newly selected Category.

Select Items, then make sure you're in Table View

Use the checkboxes to indicate the items to move

Click Bulk actions, then select Edit Items

Choose the Category where you want to move the item

Click Update

Select Items

Click the Advanced Search Icon to open the panel

Select a Category to filter the results

Select Dashboard

Use the Items By Category chart

Pick a Category to filter items