Change label of field

Client-Side Components/Client Scripts/Change Label of Field/Change label of Field.js

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+function onChange(control, oldValue, newValue, isLoading, isTemplate) {
+    // Prevent execution when the form is loading...
+    if (isLoading || newValue == oldValue) return;
+
+    // Update Description field label based on Priority 
+    if (newValue == '1') {
+        g_form.setLabelOf('description', 'Describe the critical issue in detail');
+    } else {
+        g_form.setLabelOf('description', 'Description');
+    }
+}

Client-Side Components/Client Scripts/Change Label of Field/Readme.md

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+Dynamic Field Label Change in ServiceNow
+Overview
+
+This script is created for the Incident table to change the Description field label when the Priority field value changes.
+
+When the Priority is set to 1 (Critical), the Description label becomes
+“Describe the critical issue in detail” to help users give more clear information.
+For all other priorities, it goes back to “Description.”
+
+Setup Steps:
+
+Go to System Definition → Client Scripts → New
+
+Fill in the following details:
+
+Name: Change Description Label Based on Priority
+
+Table: Incident
+
+UI Type: All
+
+Type: onChange
+
+Field name: Priority
+
+Notes
+
+Works only on the Incident form when the Priority field is changed.
+
+The label updates immediately without reloading the form.
+
+You can change the label text to fit your own use case.