What is a reason many advertisers end up undervaluing mobile's contribution to conversions?

A reason many advertisers end up undervaluing mobile's contribution to conversions is that the advertisers are using a last-click attribution model that purposely measures the performance. By that reason, it takes aside and ignores the earlier clicks found in the conversion line that is brought by another device.

ell really, the setting was in franklin and lincoln visits franklin even after he moved to columbus, and he went to school

a

b

b

a

c

b

d

d

none of these are correct, as they are all sources of american law

a