Final answer:
The DisableWebEdit parameter is used in a CMS to prevent certain fields from being edited in the Experience Editor mode, ensuring data integrity for system-generated fields or timestamps.
Step-by-step explanation:
When rendering a field in a content management system (CMS), such as Sitecore, you may use the DisableWebEdit parameter to prevent field editing through the Experience Editor mode. An example of when to use this parameter might be when displaying a field that contains content that should not be modified by the end-user, like a system-generated value or timestamp. This ensures the integrity of such values remains intact and prevents accidental modifications by content editors.