To set the homepage section, you need to add text widget in homepage title area and homepage content area under appearance-> widgets

To set the title and the sub-text:

Go to appearance-> widgets and add text widget under Homepage Title Area.
Add the title and the content that you want to display.

Homepage Title Area
 

To set sub-content:

Go to appearance-> widgets and add text widget under Homepage Content Area
Add the content that you want to display.

<div class="service-container wow fadeInLeft animated" data-wow-delay="0.4s" style="visibility: visible; -webkit-animation-delay: 0.4s;">
     <div class="circle">
          <i class="fa fa-lightbulb-o fa-4x"></i>
     </div>
     <h4>Responsive Design</h4>
         <span>Portfilo free WordPress Theme comes with a responsive design i.e it is Tablet and Mobile Optimized</span>  <a href="#">Find Out More</a> 
</div>

Homepage Content Area