Keyword Analysis & Research: what does the number 420 mean

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does the number 420 mean	1.74	0.8	9230	41	29
what	1.53	0.3	435	23	4
does	1.23	0.8	4956	70	4
the	1.78	0.5	876	48	3
number	0.97	0.9	3468	66	6
420	1.98	0.5	3398	35	3
mean	0.12	0.4	2044	92	4

Keyword	CPC	PCC	Volume	Score
what does the number 420 mean	0.02	1	3219	22