You can activate Pulse with a click on Settings > Overview > Pulse > Activate. After that you will see a new icon in your navigation bar on the left and can access the pulse section any time.
In the Pulse Settings you can activate the automated surveys. They can be send out every week, bi-weekly or once a month and include 8 questions, one of each category you can see in the picture above. They are provided with a scale. At last there will be the question "How likely are you to recommend your workplace?", which is the basis for the calculation of the eNPS (employee Net Promoter Score). The answers are completely anonymous, only if you have more than 10 employees, you get the chance to remind your employees, if they haven't filled out the survey yet.
Your employees can also use the feed to send you feedback, anonymous or not. You can review and reply to that, so you are able to take care.