Which type of innovation generally refers to minor improvements or adjustments to existing products?

Incremental innovation is characterized by small, continuous improvements or adjustments made to existing products, processes, or services. This type of innovation focuses on enhancing what is already in existence rather than creating something entirely new or groundbreaking. By making these minor changes, a company can increase efficiency, improve quality, or enhance user experience, often at a lower risk and cost compared to more radical or disruptive innovations.

In contrast, disruptive innovation involves introducing a product or service that creates a new market and value network, displacing established market leaders. Radical innovation represents significant technological advances that create entirely new industries or fundamentally alter existing ones. Breakthrough innovation implies major advancements that have a transformative impact but are not categorized strictly as incremental improvements. Thus, incremental innovation's focus on minor enhancements aligns perfectly with the definition provided in the question.