What is ServiceNow Scripting

Scripting in ServiceNow or Platform Scripting is the customization of an instance and/or applications by using JavaScript

Dependent on how the script is executed, JavaScript may execute on the client or server side and fundamentally alter how the baseline instance functions and user experience

Client refers to an application or system that accesses a remote service or another computer system, known as a server.

A server is the computer program running as a service; a physical computer dedicated to running one or more services, or a system running a database.

ServiceNow uses a Software as a Service (Saas) model; the web browser is the client. The web browser is the only thing that is installed on the client. The application server and the database live at the Data Center. Client scripts run on the client browser. Server scripts run on the server (which includes the database).

Client to server round-trips take time and make the end-user wait for the round-trip to complete. Request + Response = Round trip.