To prevent users from selecting more than one value on a picklist field, the administrator needs to change the field type from a multi-select picklist to a regular picklist, and select the "Choose only one value" checkbox on the field definition page. This will ensure that only one value can be selected on the record page and in reports and filters. Reference: https://help.salesforce.com/s/articleView?id=sf.customize_picklists.htm&type=5

Data Import Wizard allows you to import up to 50,000 records at a time.

Report folders are used to organize and secure reports in Salesforce. You can set different levels of access for different users or groups on each report folder. To preserve the integrity of the source reports for dashboards, you can create a new report folder with viewer access only and move the dashboard reports to that folder. This way, users can view the reports but not edit them. Reference: https://help.salesforce.com/s/articleView?id=sf.reports_folders.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.reports_dashboard_folder_access.htm&type=5

Recurring tasks are tasks that repeat at regular intervals, such as daily, weekly, monthly, etc. They can be created by users who have the permission to create recurring tasks, which can be enabled by administrators in the user profile settings. Flow, workflow rule, and recurring activities are not valid options for creating recurring tasks in Salesforce. Reference: https://help.salesforce.com/s/articleView?id=sf.tasks_recurring.htm&type=5

Validation rules allow you to prevent users from changing an opportunity close date to a date in the past.