Clairetenebrarum_liannalawsonhc.rd.tgp.158.jpg -

: These are common abbreviations used by indexing sites to categorize image sets or "Thumbnail Gallery Posts."

: This is likely the name or alias of a specific performer or creator. clairetenebrarum_liannalawsonhc.rd.tgp.158.jpg

Because this refers to a specific private or adult-oriented file, there isn't a "guide" for the topic in a traditional sense. However, : These are common abbreviations used by indexing