What is Control + ↑  Shift + Tab keyboard shortcut for?

Safari - Make the previous tab the active tab  

Firefox (macOS) - Go one Tab to the Left  (if the setting Ctrl+Tab cycles through tabs in recently used order is disabled in Preferences)  

Binance 1.9.1 (macOS app) - Previous tab  

Adobe Acrobat 2017 (Mac) - Move to previous open document tab (when multiple documents are open in same window)  

Zettlr (MacOS) - Select the previous tab  

Clip Studio Paint Pro - (macOS) Canvas: Previous canvas  

Xcode - Move focus to the previous grouping of controls  

Final Cut Pro X - Go to the previous pane in the inspector or the Color Board  

Pixelmator Pro - Show Previous Tab  

VMware Fusion - Show previous tab  

Parallels Desktop - Show previous tab  

Kitty 0.25.0 (MacOS) - Previous tab  

Visual Studio Code (Mac) - Open previous  

Reserved Mac - Move focus to the previous group of controls.  

Sequel Pro 1.1.2 - Select Previous Tab  

Apple Messages - Select the previous conversation  

Signal (macOS) - Previous conversation  

Twitterrific 6 - Previous tab  

iPad Smart Keyboard - Show previous tab  

iPad Smart Keyboard - Show previous tab  

Guitar Pro 8 (macOS) - Previous tab  

iPadOS 13 - Show previous tab  

Craft - Switch To Previous Tab  

Heptabase (macOS) - Jump to previous tab  

Browser tab management - (Safari) Go to previous tab  

Hudl Sportscode - Move to the previous instance note