What is the purpose of Using "Ultimate Thread Group": need to know the practical usage

Question

Can some one explain what is the purpose of Ultimate Thread Group considering it's practical usage. I am new to JMeter and as I've learned (please correct me if i am wrong), we use "Ultimate Thread Group" to time scheduling the ramp up/down time of multiple threads we create for a particular JMeter scenario script.

I feel this also can be done using Stepping Thread Group as well by having multiple threads attached to the same test plan. So i need to know exactly what is the significant usage of Ultimate Thread Group.

Answer 1

You can use it to simulate a peak of users (as the Dirac delta function)