Your system admin may have created an interactive Ripple they wish for you to complete. If so, you will see a Ripple widget at the top of your dashboard:
If you have multiple Ripples, you can flick through the cards by selecting 'View all' at the top right or by sliding the cards to the back.
To start the process select 'View steps':
You can then work your way through the different steps, once the step is completed a green tick will appear:
When all of the questions are answered you will be able to select 'Submit' at the bottom to complete the process: