Event-Based Upselling is the practice of offering additional products or services based on specific customer actions or behaviors. Businesses use CRM data to identify key moments, such as product purchases, subscription renewals, or support interactions, to present relevant upsell opportunities. For example, a SaaS company may offer a premium plan upgrade after a user reaches a feature limit, or an e-commerce store may recommend complementary products at checkout. CRMs like Salesforce and HubSpot automate event-based upselling through AI-driven recommendations and targeted email campaigns. This strategy increases revenue and enhances customer experience by delivering personalized offers at the right time.