The Scarecrow is meant to be thefriendly neighborhood assistantto helpexplain featuresof the game with quick andeasy tutorials.
Once youcompletethe steps of the tutorial he is currently showing you, he will go away until you discover the next new feature.
If you have more questions about the Scarecrow, a specific tutorial, or are having trouble – you can feel free to search the FAQs for the specific topic the tutorial is about.