Multiple areas of dynamic content in a page

I am new in WordPress and what I really can’t find how to do is the following:
I have a new Page created from the CMS. This pages have different modules with text. Take for example this template http://www.templatemonster.com/demo/40000.html

There are three modules in the row with an icon, a heading and text. And below other four. How is possible so user be able to edit from wordpress each one of these modules separately?

The example you gave has a listing of three pages and four posts (which are dated). The same can be achieved by one of the following:

1. two different Custom Post Types, one per block, e. g. post_type="products" and post_type="projects";
2. children of two another pages, e. g. children of “Products” in one block and children of “Projects” in another;
3. pages grouped by some custom field(s);
4. pages sharing two page templates, one for each block.

And may be some other methods.

It’s depends on what site structure you’ll have and what type of navigation and some other things you prefer (manual or auto).