Hello @lindaje,

The icons / contents in the Services section in the front page comes from the “Clean Corporate : Services” widget set to the “Front Page Widget Area” in the theme.

To set / change the icons and content setting sin the section, please head to your Admin Dashboard > Appearance > Customize > Widgets > Front page widget Area > Clean Corporate : Services.

Here you can manage up-to eight blocks for the services including other settings. To change the icon for each individual block, you can set the Font Awesome icon class for your desired icon under Block # > icon.

You can also refer to the theme official documentation for further instructions with screenshots here : http://themepalace.com/theme-instructions/clean-corporate-pro/#Howtomanagethemeavailablewidgets?

for reference on font awesome icon classes, see the list of available icons here : http://fontawesome.io/icons/

Hope this helps,

Best Regards !!