I might be the only one who does this, but I was very excited to learn this shortcut.
When using Chrome (this also works for Internet Explorer and Firefox), I soon accumulate so many tabs across the top of the browser that I can’t tell what’s what. I then start closing tabs and occasionally realize that I just closed the tab with the case I found after a long search session. To bring back a closed tab, just hit Ctrl-Shift-T and voilà, it’s back.