Literally googled it.
Locate the EBOOT.PBP file: Ensure you have the EBOOT.PBP file for the game you want to play.
Place the file correctly: If using PPSSPP on a PC, place the EBOOT.PBP file in the appropriate game folder within the PPSSPP "memstick" directory (e.g., memstick/PSP/GAME/[GameName]/).
On Android or other devices, the specific folder may vary, but it's generally within the PPSSPP installation or a designated storage location.
Start PPSSPP: Launch the PPSSPP emulator.
Browse for the game: Navigate through the emulator's file system to find the folder containing the EBOOT.PBP file.
Select and play: Select the game (which should be represented by its icon), and PPSSPP should load and start playing.