Reverb is used to add depth and a sense of acoustic space to a sound source. We apply it to an instrument or a voice to give a sense of dimension. However, it must be used appropriately or else it may sound weird. So here are some unexpected ways to use reverb.
There are a couple of great techniques for stereo-izing a mono source using reverb. One is to create two mono reverb sends (rather than a stereo reverb). From there we can differentiate the reverbs by changing their internal settings, or even using different reverbs entirely.
Read more about this here: https://theproaudiofiles.com/5-unexpected-ways-to-use-reverb-in-a-mix/