SuiteScript is a scripting language used to extend the NetSuite capabilities and customization available for you.
SuiteScript enables full-featured application-level scripting capabilities that support sophisticated procedural logic on both the client and server sides.
SuiteScript is the NetSuite platform built on JavaScript that enables complete customization and automation of business processes.
Using the SuiteScript APIs, core business records and user information can be accessed and manipulated via scripts that are executed at pre-defined events. For example, field change, form submit, before read, before write, or Web requests. They can also be scheduled to run at specific times.