PCG caught the Unreal Engine community by storm with 5.2 but it left quite a few people only scratching the surface. In this session Chris Murphy briefly covers the basics of PCG then dives into some of the advanced techniques to help you further your PCG dreams.
https://dev.epicgames.com/community/learning/talks-and-demos/m32b/unreal-engine-pcg-first-steps-to-advanced-development