Products with many color options can end up with a long, flat swatch list. If those colors fall into natural categories - like “Core” and “Limited Edition” - a single list doesn’t reflect that structure.
You can now link groups together so they display as separate, labeled sections on the product page. Each section gets its own title and swatch row, making it easier for customers to find what they’re looking for.
Links are set up in Advanced > Linked groups on any group page. See Split swatches with sections for the full walkthrough.