It puts tabs on the side, where they take up low-value horizontal screen space instead of high-value vertical screen space. And you can read the tab titles them even if you have lots of tabs open. And it groups them into trees -- links opened with a middle-click from one tab become children of that tab -- and you can collapse/expand trees.

Try it, you won't regret it.

Any tips on how best to use it?

you can close multiple tabs that are nested by closing the parent when its minimized.