How To Handle High-ISO Noise in Post-Processing
In almost every genre, you will encounter situations in which you are using your lens' widest aperture and you can't make your shutter speed any slower, meaning all you can do is raise your ISO. That will introduce noise into your images, but thankfully, modern post-processing software can do quite a lot to correct that, and this excellent video tutorial will show you how to leverage it to do just that.