Email alerts are a feature that allows you to create a trigger when a certain answer is given to a question. This will then send an email to someone to notify them of the answer to the question. 

Step 1: As you go along you can create Email Alerts & from the answers that have been chosen. To do this select Triggers & Email Alerts. 

Step 2: Now select Add Alert

Step 3: Now setup your alert. So what you are saying/doing here is if someone answers a question a certain way that answer will trigger an alert to a user. 

Step 4: Select from Field the question 

Step 5: Then select the answer from Field Option that will raise the trigger/alert

Step 6: Now add the user or team from Recipients that will receive the notification and select Add to list. Once done select Save.

Trigger setup will look like this below

Step 7: Repeat steps to add triggers to any question.