ServiceNow application development is based on a set of pre-built services including data management, platform analytics, scripting tools, integrations, and templates, and more intended to address certain business needs within a specific process, workflow, or industry overall. When it’s needed to extend off-the-shelf product functionality, developers can easily customize an app by adding missing pieces or create an app from scratch, assembling the functionality by separate ServiceNow components for its 100% customization.