Keyword Analysis & Research: why are some songs grey in itunes

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why are some songs grey in itunes	1.22	0.5	353	63	33
why	0.06	0.6	3871	28	3
are	0.8	0.2	5188	13	3
some	0.35	0.3	3852	77	4
songs	1.89	0.4	1522	5	5
grey	1.41	0.7	8738	60	4
in	1.85	0.8	4212	27	2
itunes	0.86	0.5	7146	34	6

Keyword	CPC	PCC	Volume	Score
why are some songs grey in itunes	0.92	0.6	8689	4