Explain what each motor does and give advantages/disadvantages for each motor. Why is a servo motor a popular choice?

Question 1:
In mechanical engineering, Describe the different motor types that can be used. (Must include a servo motor and 2/3 different motors). Explain what each motor does and give advantages/disadvantages for each motor. Why is a servo motor a popular choice?

Question 2:
Do a short literature review on the different types of motors mentioned in question 1