You must have eaten cinnamon roll, cinnamon buns, cinnamon toast. Cinnamon spice (Hindi name: Dalchini) gives a very good taste and flavor to dishes so it is used in cinnamon roll, cinnamon buns and other dessert recipes.

Cinnamon Stick Cinnamon Powder
Cinnamon spice comes from a tropical evergreen tree of the laurel family growing up to 7m in its wild state. Both the bark and leaves are aromatic. Cinnamon is the inner bark of the tree.
Health Benefits of Cinnamon
Cinnamon is used to treat nausea, flatulence, and diarrhea. The oil in cinnamon is anti-fungal and anti-bacterial. Cinnamon extracts has been used to treat gastrointestinal problems such as diarrhea or dysentery.
It is believed that the cinnamon is beneficial in controlling blood cholesterol and good for diabetes.
When you are down with cold, drink a cup of hot water with cinnamon, ginger root and some lemon. Common cold home remedies.
Cinnamon is probably one of the most aromatic of the spices. Cinnamon, an important ingredient of "garam masala" is a sweet and mildly hot spice. It is used in sweets like mawa kachori, cakes, pies, buns, toast, other baked goods, rice puddings, chocolate dishes and fruit desserts, etc.
Tips for Storing & Using Cinnamon Spice
Buy hollow brown sticks or ground powder. Whole sticks (quills) keep their flavor indefinitely. Powdered cinnamon loses its flavor quickly, so you should purchase in small quantities and keep away from light in airtight containers.
Do not store powdered cinnamon spice in refrigerator, humidity will destroy it. Powdered cinnamon spice should be stored in airtight containers in a cool dark place.