The author started a business called Paper Website, which allows users to build websites using pen and paper. The process involves taking a photo of the handwritten text, using OCR software to recognize the handwriting, and then using GPT-3 to correct spelling mistakes. The author spent $720 on 100 custom notebooks from Alibaba and launched the service, which gained popularity on Twitter and generated $1000 in revenue in two days. The service allows users to create simple websites using a notebook and a pen.