Keyword Analysis & Research: why do we use grep command in linux

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why do we use grep command in linux	1.95	0.2	1254	16	35
why	1.45	0.2	7459	40	3
do	1.64	0.6	3175	1	2
we	1.4	0.4	9906	19	2
use	1.35	0.7	4110	88	3
grep	0.99	0.5	7454	63	4
command	1.14	0.9	7351	47	7
in	0.37	0.6	1619	55	2
linux	1.96	0.1	9815	24	5

Keyword	CPC	PCC	Volume	Score
why do we use grep command in linux	1.65	0.3	5364	10