Before you can filter analytics by folders, you need to create a folder and add links to it. Then, as your links start accruing clicks, you will be able to filter your analytics by folders.
Open Analytics filter dropdown
In the Analytics tab of your Dub workspace, click on the Filter button to open the filter dropdown:

Select the 'Folder' filter option
Select the Folder option in the dropdown to open the folder filter:

Viewing filtered analytics for a folder directly
Alternatively, you can also view the filtered analytics for a folder directly, simply by opening the⋮ dropdown next to the folder in your links dashboard and select the “Analytics” option:

