you use a logarithmic scale when dealing with exponential growth or decay, as with biological populations or network adoption where each new node has its own branch of nodes and so on

it helps you see and understand the rate of change more accurately than a linear scale

decibels, which is a measure of sound intensity, are also logarithmic because the human perception of loudness is logarithmic

meaning a doubling of sound power is perceived as a constant increase in loudness, not a doubling

it doesn't make sense to plot this on a linear scale