If this is copied accurately, then there is a mis-spelling on the original. It should be SSL.
This is a VPN that uses SSL (Secure Socket Layer) technology, encrypting at layer 4, to provide a VPN service between a user and the main location. The user only has to use a web browser, such as Internet Explorer or Mozilla/Firefox, and connects to an HTTPS webpage on the Cisco ASA5500. Dependant on how the ASA5500 is configured, this can let them access web enabled applications at the main site, or may give them up to full LAN-to-LAN like the more common IPSEC VPN client (which encrypts at layer 3). The LAN-to-LAN connection does still require a VPN client to be loaded on the user’s macine, but this is done through the SSL connection, so nothing needs to be loaded before starting the connection (they do need rights to load and run an application for this to work).
I hope that answers your question.