Task: I want to buy some groceries from my favorite supermarket, Lidl. So create a note for me in the Keep Notes app with the title Grocery and add corn syrup and jam to it so that I remember what to order.
Steps:
Open the Keep Notes app
Click on the plus icon at the bottom right corner of the screen to create a new note
Type Corn syrup and Jam in the Note section 
Click on the Title section to create title
Type Grocery in the title section to set the title
Click on the right arrow button at the bottom right corner of the screen to save this note