Print protocols define basic print functions to print the format unicode and ascii string.
Include/Protocol/Print2.h

PROTOCOL Information

PROTOCOL's Guid Name	PROTOCOL's Guid
gEfiPrint2ProtocolGuid	{ 0xf05976ef, 0x83f1, 0x4f3d, { 0x86, 0x19, 0xf7, 0x59, 0x5d, 0x41, 0xe5, 0x38 } }

Refer to Header File