[NegativeK]

It's a smaller (space-wise) model that's much easier to train, both computation and input data-wise. It accomplishes a specific style or goal when combined with a full sized model.

An Emma Watson lora: https://civitai.com/models/123338/emma-watson-2010-sdxl?mode...

A lora to add motion trails: https://civitai.com/models/95680/motion-trail-after-image-or...

A lora to add a piano/black and white contrast style to the image: https://civitai.com/models/187675/piano-style-ebony-and-ivor...

If you view Civitai's list of all loras, sorted by most downloaded, you'll see a _lot_ of porn.