Keyword Analysis & Research: why will excel not let me merge cells

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why will excel not let me merge cells	0.61	0.4	2805	36	37
why	1.03	0.7	262	9	3
will	1.46	0.8	6208	8	4
excel	1.72	0.6	5306	98	5
not	1.94	1	1979	9	3
let	0.6	0.9	766	95	3
me	0.11	0.7	7575	91	2
merge	0.98	1	5386	99	5
cells	1.58	0.2	7824	30	5

Keyword	CPC	PCC	Volume	Score
why will excel not let me merge cells	0.38	0.8	6250	12