Navigate to Dashboard > CATALOG > Products > Attributes, this is an attribute list of Products. On the right Panel, You can do Bulk Action(Delete, Trash) any attribute or Search by name of Attribute
On Left Panel, Here you can quickly and easily add attributes and their terms.
After creating, you have to go to Manage Term of that Attribute by Press to Manage Terms to add more Terms for the Attribute
On Left Panel, you can add a Term for the Attribute easier.
On the Product creating, you can select terms that you added previously.