
Explain like I'm five
Imagine you have a giant cookbook with thousands of recipes. To add your own twist, instead of rewriting the whole book, you just write a few sticky notes with your changes. LoRA does the same for AI models—it makes tiny, focused adjustments without redoing everything.

Why it matters
LoRA lets you customize powerful AI models (like image generators or language models) on a normal computer, saving time and money. You encounter it in tools that let you create specific styles or characters, like Stable Diffusion models for art.

Common misconception
Many think LoRA creates new AI models from scratch, but it actually only tweaks a small part of an existing one. It doesn't replace the base model; it adds a lightweight adapter that can be swapped or removed.

Formal definition
Low-Rank Adaptation (LoRA) is a parameter-efficient fine-tuning method that decomposes weight updates into low-rank matrices, which are trained while the original model weights remain frozen. This reduces the number of trainable parameters by orders of magnitude, enabling efficient adaptation to specific tasks or domains without catastrophic forgetting.