The Blue Dot (or Blue Circle) appears at the upper-right part of your Tools (rake and move icon).
The Blue Dot appears when you have:
- crops that are ready and can be harvested
- trees that are ready and can be harvested
- empty plots of soil that can be planted
If you click the Blue Dot, it takes you to the things you’ve missed — a plant or tree that you can harvest, or an empty plot you can plant on.
When you plant all your plots and harvest all trees and crops, the Blue Dot disappears.