Email marketing provides a direct way to engage with a business’s audience, delivering content that can inform or persuade. Inbound campaigns focus on existing subscribers using insights from their behavior, while outbound campaigns target new prospects. Key examples include welcome emails for relationship-building, promotional emails to showcase offers, re-engagement emails to reconnect with past customers, and abandoned cart emails to recover sales. Regular newsletters keep subscribers engaged, and lead nurturing emails guide potential buyers. While email marketing is cost-effective and personalizable, issues like spam filters and inbox overload can arise. Platforms such as HubSpot and ActiveCampaign streamline processes to maximize impact.