What is Mark as Stale?
Let’s accept it, not all assets have ticker symbols or can be connected online for auto updates. E.g your private investments and bank.
In Kubera it is easy to enter assets and their value into a table row and update the values periodically. Just like a spreadsheet. Every update to the value (automatic or manual) is saved in history.
You can manually mark a row as Stale as a reminder to update the value.
You can also schedule a sheet to periodically mark all the manual entries as stale (every week, month, year etc.). Look for this option in the Sheets menu. By default the manual entries in your Investments sheet will be marked as stale every month.