Click the chart icon on any dashboard row (or the link itself) to open its analytics page:
Clicks over time for the last 7, 30, or 90 days.
All-time clicks and clicks in the selected range.
Top sources: where clicks came from (reddit.com, direct, and so on).
Devices and countries breakdowns.
Data appears as soon as a link gets its first clicks. If a section says there is no data yet, the link simply has not seen traffic of that kind.