Exactly. dB is just a way to apply a logarithmic scale on a quantity that would have orders of magnitude range if working with a linear scale. It allows an engineer to quickly add up all the amplification and attenuation through a series of amps and filters without having to do a lot of uglier math. It’s not really a physical unit. It’s a marker that says that we’re working in the domain of logarithmic quantities of some other units.