If enabled in the settings, Viewtracker will show you the number of views and downloads for any attachment. Here is a list of where this information will appear in Confluence.
In the Attachment Report itself
In the Attachment list of each Confluence page
Simply click on the attachments icon in the page header.
In the Attachments Macro
If the Attachments Macro is used on the Confluence page, the views will be displayed:
In the Attachment List of the Space Administration
To access it, go to Space tools -> Content Tools → Attachments