Making technical jargon understandable!
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.
A sandbox is a development or testing environment. When websites are developed or tested in a sandbox environment, it isolates untested code changes, upgrades, and experimentation from the live environment or website.
New development, testing, etc. can safely be done in a sandbox environment without your website visitors getting affected.
Call to Action (CTA)
It is a piece of content intended to make your website visitor take a certain action. A CTA needs to be the main action you want your visitor to take on a particular page, e.g. subscribe to your newsletter, buy a product, contact. Almost every page needs some kind of call to action.
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.