The social bookmarking icons have been included right on top in the header space, you can modify the links from Edit Html. Simply look for this code -
<li><a href='http://www.facebook.com/Your User Name'
Insert your facebook username and save the template, similarly, add your link for Twitter and Linkedin. The space below the horizontal menu bar is divided into two sections, one side you can include the company profile or about us and the other side is the vertical menu bar to display your services, support and so on.
This theme also features a middle bar to showcase additional categories or sections. In order to modify the default text, go to Edit Html and search for this code -
<div class='box margin_r30 box_border'>
<img alt='product 1' src='http://4.bp.blogspot.com/_yPlAAAH9bEo/TEpZZLwvGaI/AAAAAAAADaQ/cYZPZTwoyAs/s1600/folder.png'/>
Change the text at relevant spots and save the template. Follow the same steps to edit other 2 sections. Below this are customisable banner ads of different sizes.
The sidebar includes the Subscribe to email option and social media sites. You can utilise the remaining space to add blogger widgets, videos etc.
Download the Light Space Blogger Template