(I am not affiliated with SFDC) The SalesForce product is essentially a large-scale set of software tools that can be used to manage data and communications (marketing, analytics, contracts, timelines, schedules, records, helpdesk tickets, payments, etc.) between vendors and clients. It's a CRM (Customer Relationship Management) system. The reason it's not clear what their product is to non-users is that there isn't really a "default SalesForce experience"; the point of buying their software is that they (or you) are supposed to be able to customize it to the point where you can use it in exactly the way your business requires. Whether or not that is actually true is the subject of many lengthy debates on HN.