What is a Screenplay?

A screenplay, or script, is a written work by screenwriters for a film, television program or video game. These screenplays can be original works or adaptations from existing pieces of writing. In them, the movement, actions, expression and dialogues of the characters are also narrated. A screenplay written for television is also known as a teleplay.

What is Script Coverage?

Script coverage is a filmmaking term for the analysis and grading of screenplays, often within the script-development department of a production company. While coverage may remain entirely verbal, it usually takes the form of a written report, guided by a rubric that varies from company to company. The original idea behind coverage was that a producer's assistant could read a script and then give their producer a breakdown of the project and suggest whether they should consider producing the screenplay or not.

Sources: https://en.wikipedia.org/wiki/Screenplay