GPTfor.me is a useful tool that allows users to improve their GPT-3 AI experience by uploading their own content to use as context. With this feature, users can ask GPT-3 about topics it may not have knowledge of, and get more accurate responses. The tool uses a semantic search technique with OpenAI embeddings to create embeddings for both the uploaded content and the prompt. This powerful technique has a wide range of use cases, such as helping students learn more efficiently, answering questions about internal documents, teaching customers about products, summarizing key ideas from conferences, and more.