From the customizer sidebar go to Avadant Front Page Sections → Service Section
Enable Home About Section → allow you to Enable/Disable About Secion on Home page.
Title → Add Title In Service Section
Sub Title → Add Sub Title In Service Section
Description → Add Sub Title In Service Section
Background Image → Add Background Image In Service .
Service Content → Add New Slider and Put Content In Slider By Collapsing Service Tabs.
Simillarly for all Service.