What is ⌘ Cmd + W keyboard shortcut for?

Apple iBooks - Close a window  

Apple macOS - Close the front window. To close all windows of the app, press Command + Option + W.  

elementary OS - Window overview  

Firefox (macOS) - Close Tab (except for Pinned Tabs)  

Microsoft Edge (macOS) - Close the current tab  

Microsoft Edge (macOS) - Close the current tab  

Adobe Acrobat 2017 (Mac) - Close Help window  

Typora 0.9.81 (macOS) - Close  

Adobe Illustrator (Mac) - Close the document window  

Adobe Premiere Pro (Mac) - Close  

Adobe XD (Mac) - Close  

Corel Painter (Mac) - Close  

DaVinci Resolve 15 (Mac) - Show reference wipe  

Harmony 20 (macOS) - Auto render write  

OmniGraffle 7 - Close  

Pixelmator Pro - Close window  

Shotcut (Mac) - Close  

Substance Painter (Mac) - Close project  

Xcode - Close Window  

Xcode - Close the active window (equivalent to the Close command)  

xScope - Close  

Parallels Desktop - Close window  

VMware Fusion - Alt + F4  

VMware Fusion - Close  

Coda for iOS - Close tab  

CoffeeCup Web Editor - Close file  

IntelliJ IDEA (macOS) - Close active editor tab  

JetBrains WebStorm (macOS) - Close active editor tab  

RStudio (Mac) - Close active document (except on Chrome)  

Visual Studio Code (Mac) - Close window/instance  

Visual Studio Code (Mac) - Close editor  

Visual Studio Code (Mac) - Close  

Pocket for Mac - Close Window  

Adobe Bridge CC (Mac) - Close window  

Apple Finder - Close window  

iTunes 11 for Mac - Close the iTunes window  

QLab 4 - Close  

QuickTime Player (macOS) - Close window  

Apple Messages - Close the Messages window  

Cisco Jabber (Mac) - Close chat window  

Cisco Webex - Close a shared file or whiteboard  

Twitterrific 6 - Close popup or window  

Zoom (iOS) - Close the front window (such as the participants or meeting settings window)  

Zoom (Mac) - Prompt to End or Leave Meeting  

Zoom (Mac) - Close the current window  

1Password (Mac) - Close the current window.  

Adobe Captivate 2019 (macOS) - Close the project  

Apple GarageBand - Close the current window or project  

Apple Pages - Close a window  

Browser tab management - Close tab  

Final Draft 11 (Mac) - Close  

iPad Smart Keyboard - Close current tab  

iPad Smart Keyboard - Close current tab  

iPad Smart Keyboard - Close current tab  

iPad Smart Keyboard - Close window  

Kindle for Mac - File: Close book  

Melodyne 4 (Mac) - Close  

Nuendo 10 (macOS) - Close  

QuickBooks Desktop (Mac) - File > Close Window  

Superhuman (macOS) - Close tab  

Tableau (Mac) - Close the current workbook  

Things (Mac) - Close current window  

GeoGebra - Quit GeoGebra  

JMP 15 (macOS) - Close active window  

JMP 15 (macOS) - Close the currently selected tab  

Originlab Origin 2020 (Mac keyboard) - Close the active worksheet / graph / matrix window