Keyword Analysis & Research: what are the rules of significant digits

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what are the rules of significant digits	0.75	0.1	6750	32	40
what	1.37	0.7	6849	25	4
are	1.33	0.5	3111	19	3
the	1.75	0.7	645	26	3
rules	1.54	0.1	8517	83	5
of	1.63	0.9	5517	34	2
significant	0.56	0.2	6382	25	11
digits	0.21	0.9	3325	71	6

Keyword	CPC	PCC	Volume	Score
what are the rules of significant digits	1.89	0.5	913	26