Each time you log into SAP, you start a new session.

An SAP session simply means you have started the SAP GUI and have established a connection with an SAP system.

At any given time you can start multiple sessions (using the same User ID) with multiple SAP products like SAP ERP, SAP CRM etc.

Or at any given time you can start multiple sessions with the same SAP product e.g. SAP ERP.

When you are connected the number of current session is displayed in the status bar

Opening multiple sessions at a time allows you to multi-task.

You can do an order entry and at the same time run a financial report.

You don't have to stop entering the order in order to run the report.

By default you can start up to six sessions. System Administrator can increase this limit.