Keyword Analysis & Research: why is it called the red zone

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is it called the red zone	1.4	0.9	9040	46	29
why	1.3	0.8	3212	69	3
is	0.32	0.6	8683	46	2
it	0.73	0.2	8226	43	2
called	0.42	0.7	7347	94	6
the	0.8	0.5	6111	97	3
red	0.32	0.3	2737	20	3
zone	0.42	0.8	5614	38	4

Keyword	CPC	PCC	Volume	Score
why is it called the red zone	1.59	0.2	3450	68