Keyword Analysis & Research: what does error 404 mean on google

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does error 404 mean on google	1.27	0.5	2484	29	34
what	1.8	0.4	1555	91	4
does	0.07	0.5	8456	61	4
error	1.06	0.2	9196	56	5
404	0.42	0.2	1493	71	3
mean	1.52	0.1	6345	90	4
on	1.12	0.6	6029	52	2
google	0.58	1	1144	26	6

Keyword	CPC	PCC	Volume	Score
what does error 404 mean on google	0.39	0.1	6373	53