What is a Glow Filter and Why have I been using it so much recently?

Glow filters (aka black mist or bloom filters) are nothing new in photography yet I feel like I don’t see them talked about very much in the space of nature photography. I suspect this is likely because the majority of people in that space are very technical and want to capture images in the flattest, purest ways possible. I must admit it feels a little wrong to put something in front of my lens…