The role was taken away from Stokes following a late-night brawl in Bristol but was reinstated as Root's deputy ahead of the Ashes.
Jos Buttler had been given the role of Root’s deputy but England and Wales Cricket Board director of men's cricket Ashley Giles and chief executive Tom Harrison approved Stokes’ appointment.
Speaking on a weekend visit to his old club in Cumbria, Stokes said: "I love having that responsibility and it is something that I thoroughly enjoy doing. I take pride in being vice-captain. Being part of that think-tank is pretty cool.
"I am very good friends with Joe as well, off the field, and as much as I can do to help him through his career, not just as a captain but as a player as well, I am really looking forward to that challenge.
"I think it would have been just as exciting anyway. Playing in an Ashes series is always special and they don't come around that often but being named vice-captain again was very good words to hear when I got the call."
The Durham all-rounder had to miss out the last Ashes against Australia in 2017/18 after he was dropped from the side following the series of events that took in Bristol.
Stokes said England had an amazing journey in the World Cup but now it was time to focus on the Ashes which is going to be a competitive series.
"Everything is sort of on the Ashes now," he said.
"We have had that time to let everything sink in and reflect on that amazing seven weeks we have had in the World Cup, but the World Cup was half of the journey that we wanted to achieve this summer and the other half is winning the Ashes.
"Everything has been focused on what we are going to do to beat the Australians. It is going to be a busy six weeks. Five Test matches against Australia isn't easy."