Keyword Analysis & Research: what does validity refer to

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does validity refer to	1.7	0.9	4000	14	27
what	0.77	0.2	861	42	4
does	0.35	0.1	517	90	4
validity	0.92	0.9	8899	19	8
refer	1.98	0.2	3107	32	5
to	0.06	0.9	4308	1	2

Keyword	CPC	PCC	Volume	Score
what does validity refer to	0.55	0.1	1688	96