Here is a list of the most common keyboard shortcuts for Google Chrome on Mac! Its really useful.
⌘+N Opens a new window.
⌘+T Opens a new tab.
⌘+Shift-N Opens a new window in incognito mode.
⌘+click a link Opens the link in a new tab in the background
⌘+Shift+T Reopens the last tab you’ve closed.
⌘+Option+right arrow Switches to the next tab.
⌘+Option+left arrow Switches to the previous tab.
⌘+W Closes the current tab
⌘+, Settings page.
⌘+Y History page.
⌘+Shift+J Downloads page.
⌘+L Highlights the URL.
⌘+Shift+I Emails the current page.
⌘+D Saves the current webpage as a bookmark.
⌘+0 Returns page to normal size.
Extra!
⌘+Option+I Developer Tools.
⌘+Option+J JavaScript Console.
⌘+Option+U Opens the source of your current page.
Cool!
⌘+: Spelling and Grammar dialog.
⌘+; Checks the current page for spelling and grammar
For the complete list check this link
