Keyword Analysis & Research: what is the meaning of don't tread on me flag

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what is the meaning of don't tread on me flag	1.56	0.8	7141	7	45
what	1.87	0.1	3354	82	4
is	0.64	0.8	7137	64	2
the	0.59	0.5	1834	12	3
meaning	1.65	0.7	5542	65	7
of	1.12	0.5	8086	43	2
don't	1.2	0.3	2928	11	5
tread	1.92	0.6	8252	17	5
on	0.63	0.6	1771	51	2
me	1.76	0.5	1672	16	2
flag	1.77	0.4	5451	89	4

Keyword	CPC	PCC	Volume	Score
what is the meaning of don't tread on me flag	1.48	1	7297	69