Answer:
Time travel is the concept of being able to use a device to take you forward or back in time so you are able to go to certain points in history or the future. Time travel is a simple concept although many scientists today believe it is impossible to achieve speaking how modern technology is in no way advanced enough to make time travel possible. Personally, I believe that time travel will never be possible but it will still be used in science fiction to create good stories.
I hope this helps.