Tags come in three sizes small, large and X-large. Red and green arrows in the hoods mark them. Red arrows mean you must tag these spots to complete the level.
Green arrows indicate bonus tags.
You do not need to hit the green arrow tags to finish the level but they are great to increase your points. These tags take one can of paint and you do not need to stop to paint a small tag. Press the L trigger as you are skating by the tag and you will tag the spot. As long as you are relatively close to the spot where the arrow is the tag will automatically hit it. Large Tags These tags take three cans of paint and you will need to stop in order to hit them.