Mockup: A model of a web design, showing where text, images, & other elements will be placed on a page.
Infinite Scrolling: A design technique that allows you to scroll down a webpage indefinitely to see new content so you never reach the footer or bottom of the page (e.g. Pinterest).
Flat Design: A type of 2D design that avoids textures, gradients, or drop shadows that would otherwise create a 3D effect.
Responsive design: A design that adapts to the device a person is using (e.g. desktop, tablet, or mobile), so webpages look good on any screen size.
Domain Name: How IP addresses (a combo of four numbers, e.g. 188.8.131.52) are named, using mostly the abc's. One domain name may represent several IP address. E.g. greatmatter.com.
DNS (Domain Name Server): How domain names (e.g. www.greatmatter.com) are translated into IP addresses (e.g. 184.108.40.206). The DNS translates because domain names are easier for humans to remember while IP addresses are easier for computers to process.
IPAddress (Internet Protocol Address): A four number code separated by periods, used to identify every computer network, computer, and device. Numbers range from 0 to 255. E.g. 220.127.116.11 (for IPv4)
Hosting is a service that allows a company or private individual's website to be accessible over the internet. The actual host is a computer w/ a web server. Hosting companies include Rack Space, Pantheon, Bluehost, and GoDaddy.
Landing Page: A page designed to specifically increase the number of leads; with marketing/advertising in mind, it's used to guide a person towards taking a very specific action.
Hero Image: The large image, or banner, that's placed very prominently at the top of a webpage. The hero image can include an image, text, video, or rotating slides.