An up-sell feature is a feature that encourages customers to buy a more expensive or advanced version of a product or service, or to add additional products or services to their purchase. An up-sell feature can increase the revenue and profit per customer, and enhance the customer value proposition. An add-on feature is a type of up-sell feature that adds functionality or benefits to the existing product or service, and usually requires an extra payment or subscription. For example, a cloud storage service may offer an add-on feature of extra storage space or enhanced security for a higher fee.
References:
* Feature Categories: This article from the Scaled Agile Framework explains the concept and purpose of feature categories, and how they can help product teams prioritize and communicate the value of features. It also describes the four main feature categories: new business, up-sell, operational efficiency, and retainment.
* Product Roadmap: Examples, Types and Key Features: This article from AltexSoft provides a comprehensive guide on product roadmaps, including their key features, common types, and examples.
It also provides some tips and best practices on roadmap creation and communication.