Playwrights use stage directions to do the following:
Describe settings and characters
Indicate gestures for actors
Suggest tone of voice
Stage directions offer many functions, but their primary purpose is to guide the actors' movements on the stage, which is also called as blocking.
Stage directions also gives the instructions about lighting, scenery, and sound effects infact the entire structural procedure, but their main purpose is to guide the actors through their movements onstage.
The stage serves as a platform, space for actors or performers to show their talent in-front of the entire crowd.
In the language of script, don't use round brackets for anything other thing than a stage direction because stage directions should be contained by the round brackets
