The hamburger menu or hamburger icon is a name given to the menu icon found on websites that hides the traditional horizontal or vertical menu bar.
Also referred to as the hotdog menu or three-line menu. The hamburger menu is especially useful on mobile devices as makes it easier to view the different menu options, while taking up less real estate.
New development, testing, etc. can safely be done in a sandbox environment without your website visitors getting affected.
Call to Action (CTA)
A call to action should stand out from the rest of the page content. This makes it easy for a visitor to take the desired action.
When this happens the browser bar will not display the usual Lock symbol on the browser bar.
Normally your website browser bar should appear like this: