A very short version of your sales pitch - short enough to tell it to someone in an elevator before you reach your destination.
In web design the "elevator pitch" variant of the sales pitch is often used on landing pages where the aim is to get the user's attention and make them curious enough to click through to the longer version of the pitch.
A link that opens the users default email client to send an email to the address in the link. The syntax is the same as for a regular link, with the addition of "mailto:" in front of the target, which in this case would be the email address.
A method for testing the effectiveness of a web page. An eye tracking device monitors the movement of the pupil to determine where on the page the subject looks first. It tracks the movement of the eye as the subject scans the page. This information is then used by the web designer to improve the page layout.