For Opportunities that have not been updated in the last 30 days, how should a System Administrator implement a flagging mechanism?

Creating a formula field to calculate the time since the last update and display a visual indicator, such as an image of a red flag, is an effective way to alert users when Opportunities have not been updated in the last 30 days. This approach directly addresses the requirement of monitoring the last update date and provides a clear and intuitive visual cue that can be easily spotted by users.

By implementing this mechanism, you enable a proactive system of management. Users can quickly identify which Opportunities may need attention without having to sort through data manually or rely solely on numeric values. The image of a red flag serves as a clear, standardized alert that communicates urgency, prompting users to investigate further.

To ensure visibility and usability, the formula can be structured to check the date of the last update against the current date, calculating the difference to determine if it exceeds the specified timeframe. This method ensures accuracy while providing a straightforward way to manage Opportunity records effectively.

In contrast, the other options focus on functionalities that either wouldn't meet the requirements or wouldn't provide a clear alert for the specific scenario of identifying unupdated Opportunities.