In audio or in measurement applications it is sometimes neccessary to block the DC signal and only to let the AC part of an analog or digital signal pass through a circuit.
There you decouple the signal with a series capacitor (high pass filter).
Depending on key requirements such as lowest corner freqeuncy of the high pass filter, size of the capacitor, cost and maximum distortion you will have to chose eighter an elektrolytic or ceramic or a polyester type.... of capacitor.
Polarized capacitors have a quite high distortion in comparison to non polarized caps due to non linearities, especcially when reverse polarizing them. But non polarized caps grow hughe in size and are more expensive than electrolytic caps.
You will always have to make a compromize between different solutions. It is possible to combine different types of capacitors. Electrolytic caps are quite slow for high frequencies. A digital circuit for example running at 200 MHz only stabilized by a 100µF electrolytic capacitor will probably not work. The ESR of this cap and especcially the ESL will be much to high to keep the circuit stable. Then you can add some small 100nF ceramic caps close to the circuit. These components can provide high currents for a very short time. They will block peak current consumptions from the circuit. But because of the small capacity value the 100nF component can not provide the current for a long time. There the slow but bigger 100µF cap will help and will provide current if the higher current consumption will last for longer.
In high frequency range (500MHz - 4GHz) some 1nF in 0603 SMD case are added.
Hope it helps,
aOxOmOx