Salesforce Administrator ADM-201 Book

App page and record page are two types of pages that an administrator can build and customize using Lightning App Builder for Salesforce mobile app. App pages are pages that display information or tools that don’t belong to a specific record; they can be accessed from navigation menus or tabs in Salesforce mobile app. Record pages are pages that display information or actions related to a specific record; they can be accessed by opening any record in Salesforce mobile app. User page and dashboard page are not types of pages that can be built using Lightning App Builder for Salesforce mobile app; they are types of pages that can be built using other tools such as Profile settings or Dashboard Builder. References: &type=5

Field update and email alert are two types of automated actions that can be added as part of the approval process. Field update allows you to change the value of a field on a record when it is submitted, approved, rejected, or recalled. Email alert allows you to send an email to one or more recipients when a record is submitted, approved, rejected, or recalled.

Opportunity contact roles allow you to track ROI for contacts that are key stakeholders for opportunities. You need to customize the contact role field and add the related list to the opportunity page layout.