I build Websites. HTML or CMS (Core)Content-Management-Systems. This CMS site is responsive and will size to any format like phone or iPad. You can click and drag the right side of this window to see it in action.   Most people start with an Intro page, that introduces them to potential site visitors. It might say something like this:

The XYZ Doohickey Company was founded in 1971, and has been providing quality doohickeys to the public ever since. Located in Gotham City, XYZ employs over 2,000 people and does all kinds of awesome things for the Gotham community. Doohickeies come in different sizes and colors so it will match your needs perfectly! Look at our monthly specials!

CMS sites are oriented toward functionality, repeatability and themes site wide and categories for large traffic sites and large amounts of content and has responsive coding to automatically resize to fit any size screen. Many things can be done on sites like this having video, music, slide show, animation,  background, comments, blogs, forums, widgets on the sides, headers, different menus, however, all items must be in boxed areas, some design limitations are there without huge CSS work or fancy coding. With all the growth today on mobile function and device-oriented capability CMS is very popular!