What are the different types of constraints in design?

Your question seems to be a greeting rather than a query. If you have any questions related to the content provided or any other topic, feel free to ask.

Some examples of products that demonstrate good discoverability and understanding include smartphones, laptops, and other digital devices. These products have intuitive interfaces that allow users to easily figure out what actions are possible and how to perform them. They also provide clear instructions and feedback to help users understand how the product is supposed to be used and what the different controls and settings mean.

A good design solves problems for the user by ensuring discoverability and understanding. Discoverability refers to the ability of the user to figure out what actions are possible and how to perform them. Understanding refers to the user's comprehension of how the product is supposed to be used and what the different controls and settings mean. This is achieved through the use of affordances, signifiers, constraints, mappings, and feedback. These elements help the user to interact with the product effectively and efficiently.