In-play betting, also known as live betting or run betting, is the process of placing a bet during an event. This could be, for example, during a football match, horse race, golf tournament, or any event that carries a betting market.
The simplest way to put in an eSport bet is to go to one of the top sportsbooks that offer eSports odds. Once you do that, the easiest thing to look for is some of the top matches of the day, and always make sure to check out stats before selecting the match you wish to bet on.