After installing the S4S Sitecore Package a Sublayout called FuseITLoadPreviousVisit will be added to Sitecore content tree. Add this sublayout to the Sitecore item on which you want the content to be displayed according to the values set in Salesforce.
Follow the steps below to add the sublayout to a page.
Sitecore Analytics Synchronisation (Pre-Sitecore 9)