Instructions not descriptive enough

[SashaCanfield03]

I was following the instructions to get the program running on my local machine. However, I'm stuck at the part where it says:
Start the Stable Diffusion Webui

Where is the Stable Diffusion Webui, and how do I start it? Is it something I need to install, or is it something that is already on aios? If I need to install it, where do I get it? If it's already on aios, how do I run it?

[Synthintel0]

In order to create pic, you need to install a stable diffusion webui by yourself. You can learn how to install SD in their project
https://github.com/AUTOMATIC1111/stable-diffusion-webui.