An authentication app is a mobile app that generates verification codes for logging in to Salesforce or other services that require multi-factor authentication (MFA). A username and password are also required for logging in to Salesforce, but they are not sufficient for MFA. Reference: https://help.salesforce.com/s/articleView?id=sf.identity_auth_apps.htm&type=5

Planning deployments around maintenance schedules ensures that there are no interruptions or delays in the deployment process. Deploying all dependent components ensures that there are no missing metadata or references that could cause errors or failures in the deployment. Limiting change sets to 10,000 files ensures that the deployment does not exceed the maximum size limit for change sets

An after save flow is a type of flow that runs in the background after a record is saved and performs actions based on the record data or changes. An after save flow does not require user input or interaction and can be triggered by a record-triggered flow element or by an Apex trigger. In this case, you can create an after save flow that runs when a case record is updated and delivers status update email to customers based on certain criteria or conditions. Reference: https://help.salesforce.com/s/articleView?id=sf.flow_trigger_types.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.flow_concepts_trigger.htm&type=5

One possible cause of unexpected changes to record values is having multiple automation tools that update the same field on the same object. This can create conflicts and overwrite each other's values. To resolve this issue, the administrator should consolidate automation tools and use only one tool per object and field combination. This can help avoid confusion and ensure consistent results. Reference: https://help.salesforce.com/s/articleView?id=sf.process_which_tool.htm&type=5 https://trailhead.salesforce.com/en/content/learn/modules/business_process_automation/automation_considerations

Flows deployed with change sets are inactive by default and need to be manually activated in the destination org before they can run. Deploying or redeploying a flow with change sets creates a new version of the flow in the destination org, which preserves the previous versions and allows for rollback if needed. All flow dependencies, such as custom fields, objects, or variables, are automatically added to the change set when a flow is added