A validation rule is a feature that allows administrators to define criteria for data entry or import operations and display an error message when those criteria are not met. For example, a validation rule can ensure that house showings are scheduled within the current year by comparing the showing date field with a formula that returns the current year. If the showing date field contains a date outside of the current year, then the validation rule will prevent users from saving or importing records with an error message. Reference: https://help.salesforce.com/s/articleView?id=sf.fields_about_validation_rules.htm&type=5

A formula field is a type of field that calculates a value based on an expression or formula that references other fields or constants. For example, a formula field can display today's date by using the TODAY() function. In this case, the administrator can create a formula field on the account object that updates the audited date field with today's date when the status of the account is changed to 'Audited'. Reference: https://help.salesforce.com/s/articleView?id=sf.fields_about_formulas.htm&type=5

Utility bar is a feature that is available in a Lightning app where visibility is limited to the Salesforce mobile app. Utility bar allows users to access common productivity tools, such as notes, history, recent items, and more, from any page in the app. Reference: https://help.salesforce.com/s/articleView?id=sf.app_builder_utility_bar.htm&type=5

Campaign hierarchy is a feature that allows administrators to organize campaigns into a parent-child relationship, where the parent campaign represents a larger initiative and the child campaigns represent smaller or more specific activities within that initiative. Using campaign hierarchy can help Ursa Major Solar report on campaign ROI by month and series by creating a parent campaign for the series of networking events and creating individual child campaigns for each monthly event. The parent campaign can show the aggregated metrics and ROI for the entire series, while the child campaigns can show the metrics and ROI for each month. Adding different record types for the monthly event types, creating individual campaigns that all have the same name, or configuring campaign member statuses to record which event members attended are not solutions for reporting on campaign ROI by month and series; they either do not group campaigns into a hierarchy or do not track campaign metrics or ROI. Reference: https://help.salesforce.com/s/articleView?id=sf.campaigns_hierarchy.htm&type=5

Flow builder is an automation tool that allows administrators to create flows that guide users through screens, collect data, and perform actions on records. It can be used to simplify the account creation process by creating a screen flow that shows only the essential fields for creating an account and hides any unnecessary fields or sections from the page layout. Approval process, workflow rule, and validation rule are not automation tools that can simplify the account creation process; they are used for different purposes such as approving records, updating fields, or enforcing data quality. Reference: https://help.salesforce.com/s/articleView?id=sf.flow_builder.htm&type=5