diff --git a/src/web/src/types/marketing.ts b/src/web/src/types/marketing.ts
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+/**
+ * @fileoverview Marketing-related TypeScript type definitions for the web application
+ * 
+ * Requirements addressed:
+ * - Type Safety (9.1 Programming Languages/Frontend):
+ *   Ensures type safety in marketing-related data structures by defining reusable 
+ *   types and interfaces.
+ * - API Design (8.3 API Design/8.3.2 Interface Specifications):
+ *   Provides structured types for marketing-related API responses and requests,
+ *   ensuring consistency and type safety.
+ */
+
+import { ApiResponse } from './api';
+import { CommonError } from './common';
+import { Episode } from './episode';
+
+/**
+ * Represents a marketing campaign with its essential metadata and content information
+ */
+export interface MarketingCampaign {
+  /** Unique identifier for the campaign */
+  id: string;
+
+  /** Title or name of the marketing campaign */
+  title: string;
+
+  /** List of social media or marketing platforms where the campaign will be distributed */
+  platforms: string[];
+
+  /** The actual content or message of the marketing campaign */
+  content: string;
+
+  /** Scheduled date for the campaign to be published */
+  scheduleDate: Date;
+
+  /** Current status of the marketing campaign */
+  status: 'draft' | 'scheduled' | 'published';
+}
+
+/**
+ * API response structure for a single marketing campaign request
+ * Extends the standard ApiResponse with MarketingCampaign as the data type
+ */
+export interface MarketingResponse extends ApiResponse<MarketingCampaign> {
+  /** Marketing campaign data */
+  data: MarketingCampaign;
+
+  /** HTTP status code */
+  status: number;
+
+  /** Human-readable response message */
+  message: string;
+}
+
+/**
+ * API response structure for paginated marketing campaign list requests
+ * Contains pagination metadata along with the marketing campaign data
+ */
+export interface MarketingListResponse {
+  /** Array of marketing campaigns */
+  data: MarketingCampaign[];
+
+  /** Total number of campaigns available */
+  total: number;
+
+  /** Current page number (1-based) */
+  page: number;
+
+  /** Number of campaigns per page */
+  pageSize: number;
+}
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