This article keeps repeating this gushing fanboy style obvious facts. Sure, it's a pretrained set. Only key interest in even reading your "guide" -- how can we use GPT-3 on our own data sets, for example, all servicing/support emails or call logs for the last 10 years. Hmm?
Link to content: Building a Customer Service Chatbot with GPT-3: A Step-by-Step Guide - Section 1