Tag - run after each other.
Tag по английски - это название игры "догонялки".
Дальше объяснение что такое "Tag (игра)"
Tag is a playground game that involves two or more players chasing other players in an attempt to "tag" or touch them, usually with their hands. There are many variations; most forms have no teams, scores, or equipment. Usually when a person is tagged, the tagger says, "Tag".