Radioportation is a very useful skill. It falls under the category of transportation skills. After many tests and, painful, experiments heroes/heroines have found that radioportation relies on radio waves to transport the hero/heroine.
This skill is incredibly useful to heroes and heroines alike as it allows them to travel much quicker from place to place. At a lower level it may move you just a few monsters away. However, at a higher level it transports the hero or heroine a couple milestones further along their path.
Many pets also enjoy when their masters get this skill as it allows them to not have to walk as far. Radioportation has no known side effects at the moment, but does have many positives.