Whenever you run a process, it creates a new session which stores its current step and the log of previous steps, including inputs and outputs of the user/connectors.
To run a process, switch to its Run tab:
Then click Run button at the top of the page:
It will create new session, display process description, then you will be able to get to the first step of the process by clicking Start button at the bottom:
Then you will follow the sequence of steps one-by-one, clicking Next button whenever you are done with the current step.
At the end, you will get “Done!” message which means that the session is over because it reached the end of the process.
Hint: you can got back by clicking Back button at the bottom left corner of the session screen.