Bomb Jump
From ALttP Speedrunning Wiki
A bomb jump enables Link to cross short gaps by taking damage from a bomb, pushing Link over the gap.
How to perform it
Different types of bomb jumps requires different techniques.
The simplest form of a bomb jump is getting across a two-tile gap (or less) in a cardinal direction. There's generally two methods for this trick:
No bonk
Link needs to be placed one or two pixels away form the gap, with a bomb going off on the opposite side of the gap. File
Some more advanced applications of performing a bomb jump can be found on Palace of Darkness, Hammeryump and Ice Palace, IPBJ.