Chrome tab groups and windows solve different parts of project organization. A group organizes tabs within a Chrome window. A window becomes a separate macOS object that can sit beside an editor, appear in system window views, and move independently between displays.
Choose a tab group for compact browsing
Use a tab group when the pages share one browser profile and you mainly visit them sequentially. Groups can be named, colored, collapsed, closed, and reopened. With Chrome sync enabled for history and tabs, saved groups can also follow the signed-in Google Account. That makes them useful for a research bundle or a recurring set of web tools.
A group is weaker when you need two pages visible at the same time or when the web material must stay beside another application. Collapsing a group reduces tab-strip clutter, but it does not create another macOS window.
Choose a window for cross-app work
Move tabs into a separate window when the project needs its own visible surface, a different display position, or a stable companion to a document or editor. Chrome requires the source and destination windows to use the same profile when moving a tab through its window menu. A separately named window can also be easier to recognize among several Chrome windows.
The cost is more system-level clutter. If every small topic becomes a window, switching becomes harder and project boundaries blur again.
Use both when the project earns it
A practical setup is one project window containing two or three named groups: active work, references, and follow-up. Split out a second window only for material that must remain visible beside the primary work. Wallo can organize those separate Chrome windows with other app windows, but it cannot manage the tab groups inside them.