Keyword Analysis & Research: what does bn mean in text

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does bn mean in text	0.5	0.1	2448	26	25
what	0.39	0.8	7825	84	4
does	1.31	0.4	735	79	4
bn	0.61	0.2	9785	30	2
mean	1.89	1	6386	46	4
in	1.89	0.9	2545	17	2
text	1.73	0.5	798	69	4

Keyword	CPC	PCC	Volume	Score
what does bn mean in text	1.72	0.4	8561	55