Getting started with OpenAI's GPT-3 in Node.js requires an up-to-date version of Node.js and npm, as well as an API key from OpenAI. The GPT-3 model is a highly advanced language model trained on a giant amount of text that can generate text following a similar style and structure to the input provided. It's versatile and can be used for various tasks such as generating dialogue for chatbots or telling stories. The engine does not really "understand" text, so when it generates text, it needs to know when to stop. A stop phrase is needed to indicate where the generation should end. Parameters like temperature, frequency penalty, presence penalty, and max tokens can be used to tweak how you want GPT-3 to generate text. The Playground is a great way to get started exploring the API, and there's also an unofficial tool that allows experimentation with the search endpoint for semantic search over documents.