The utility bar is a fixed footer that gives users quick access to productivity tools, such as notes, history, and recent items. It can be customized for each Lightning app to enhance the user experience and efficiency. Some of the standard use cases for using the utility bar are:

Perform common tasks without navigating away from the page: Users can use the utility bar to perform tasks such as creating notes, logging calls, or sending emails without leaving their current context. This reduces the need for switching tabs or opening new windows, and saves time and clicks.

Access to view a list of records favorited for quick access: Users can use the utility bar to access their favorites, which are records, lists, groups, or other items that they have marked with a star icon for easy access. This allows users to quickly navigate to the items they use most frequently, and organize them in a personalized way.

Access at any time to a customized set of items specific to an app: Users can use the utility bar to access items that are relevant and useful for the app they are using. For example, in the Sales app, users can access the Lightning Dialer, the Assistant, or the Today’s Events utility. In the Service app, users can access the Omni-Channel, the Macros, or the Case Timer utility. The utility bar can be configured to show different items for different apps, depending on the user’s needs and preferences.