Explanation
The users can improve their end-user experience by favoriting the often used object and personalizing the navigation bar. Favoriting the object allows the users to access it quickly from the Favorites menu in the header. Personalizing the navigation bar allows the users to add, remove, or reorder the items that they use frequently. These features do not require the administrator to create a new app or modify the existing one, and they can be customized by the users themselves according to their preferences and needs. References:
[Salesforce Certified User Experience Designer Exam Guide], Section 3.1: Design and implement solutions that meet user needs
[UX Designer Certification Prep: User-Centered Design], Unit 4: Design for User Needs
[Prepare for Your UX Designer Credential], Trailmix: User-Centered Design
[Salesforce Help: Favorites in Lightning Experience]
[Salesforce Help: Personalize Your Navigation Bar]