How many times have you gone to a party and been introduced to several people, only to have their names go in one ear and out the other? The person reading your script is no different. You know your own characters, but they don't, and hurling names and descriptions at them isn't enough. Watch this short video on how to introduce several characters at once without losing the reader. 

If you want to learn more, check out my entire screenwriting course: The Scriptfella Program