If needed, create a page with additional information.
If your service is one where customers will require more data (details, specifications, etc.) from you, then you can consider creating an additional page as an extension to your main landing page.
See how Apple iPad Mini has a main landing page: http://www.apple.com/ipad-mini/overview/
and then they have other additional information pages like: http://www.apple.com/ipad-mini/specs/