What is weight?

I think you probably mean model weights… :

A simple way to picture it might be a huge recipe.

A model has an enormous number of numerical “amounts” inside it. During training, those amounts are adjusted little by little depending on how well the model is doing. Those adjustable numbers are its parameters, and many of them are weights.

So when you see something like “download/load the model weights” on Hugging Face, it basically means getting those learned numerical settings instead of starting with an untrained model.