To attract new followers interested in ocean cruising, the company specializing in river cruises should use paid advertising on social media. Paid advertising allows for precise targeting based on demographics, interests, and behaviors, making it possible to reach a new audience specifically interested in ocean cruises. This approach can quickly expand their follower base and generate leads. Banner advertising is more static and less targeted, organic advertising relies on existing followers to spread the word, and viral advertising is unpredictable and cannot be relied upon as a primary strategy. Paid advertising offers control and scalability, essential for targeted expansion.