Understand that the guitar effect of the chorus is nothing more than an internal program that processes a signal. It can come as a software program, an element of the amplifier, a table top independent item or a foot pedal.
Strum and the processor picks up your signal and delays the relay as it copies it. It then mixes your signal with the copy.
Turn a knob and you can cut out the dry signal, the signal from the guitar. The choice of how much wet signal, from the reproduction of your chord, and how much dry signal you want creates various guitar effects from the chorus control.
Remember that the chorus is similar to the flanger but the delay time is different. The guitar effect of the chorus has a longer delay and no use of feedback like there is in the flanger.
Vary the delay of the guitar effect of the chorus to get a different sound. Shorter and longer delays can create not only different sounds but distortions in the notes that you get back. There are a variety of great sounds you can get by using the chorus effect in different ways.
Choose a single or multi-effect box when you add the chorus. You can get some single effects from the stomp boxes or use a rack mount, pay extra and have a multiple of effects. The accessory choices are huge and you may want to have several types on hand to find and keep the best sound for your guitar.