Long Jump Block
From the Super Mario Wiki
A Long Jump Block is a type of Block that first appears in Super Mario Run. They have a similar appearance to Backflip Blocks and Pause Blocks (when the player is standing on it), but they are instead yellow with a red arrow. When the player taps the screen while running across these blocks, they will perform a Long Jump. Additionally, if the player taps and holds the screen, the jump will cover more ground.