Image seems to be signed by google test keys

[DNDEBUG]

Boot Signature Tool v1.6 (c) B.Kerler 2017-2019
----------------------------------------------
Kernel=0x00000800,	length=0x00677000
Ramdisk=0x00677800,	length=0x000FE800
Second=0x00776000,	length=0x00000000
QCDT=0x00776000,	length=0x00000000
Signature start=0x00776000

ID: 38f9bf8418d5066b191b1806269d80d9dd9fc59a000000000000000000000000
Image-Target: b'/boot'
Image-Size: 0x776000
Signature-Size: 0x776000

Calced Image-Hash:	278ae206bb998e267f1782ecd9b50fa0173689ef141f2c69f4170820fffd16c0
Signature-Hash:		1bbfe7fb13f634ebafd401840732b578a54fb32b10ae1fdd412ea5d0902f23e7
AVB-Status: RED, 3 or ORANGE, 1

Signature-RSA-Modulus (n):	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
Signature-RSA-Exponent (e):	010001

!!!! Image seems to be signed by google test keys, yay !!!!

TZ Root of trust (locked):		3bd07d4fc1cea0698c699c8f3a167a80dbd96affc402a6fc924ea46edc2e8381
TZ Root of trust (unlocked):	80d72c4aafdd168c9bb44be519124ea518d79c18ac030d99f13343f595ee18a4

´´´

what is that, and what can i do with it?