Explanation
The /enableTTL "1" configuration must be applied to enable re-fetching of cached items based on Cache Headers sent by AEM. This configuration enables the Time To Live (TTL) feature of dispatcher, which allows dispatcher to check the Cache-Control and Expires headers of the cached files and re-fetch them from AEM if they are expired.
References:https://experienceleague.adobe.com/docs/experience-manager-dispatcher/using/configuring/page-inv

Explanation
Adobe Client Data Layer is a JavaScript library that provides a standardized way to collect, structure, and manage data on a web page. It can be used to implement an event-driven data layer for analytics solutions. It integrates with Core components and allows authors to configure data layer properties for each component. It also supports custom events and data sources. References:
https://experienceleague.adobe.com/docs/experience-manager-core-components/using/developing/data-layer.htm

Explanation
A proxy component is a site-specific component that inherits from a core component and allows customization of the component name, group, dialog, and behavior. A proxy component can refer to any version of the core component by changing the sling:resourceSuperType property. A custom sling model can be used to implement the logic for adding the page title as prefix to the text property. A component template can be used to define the layout of the component.

Explanation
The merge import mode is used to import content that is already present in the repository without overwriting it and without removing content that is not present in the package. This mode preserves existing content properties and nodes while adding new ones from the package. This mode is useful for incremental updates or initial content seeding. References:
https://jackrabbit.apache.org/filevault/vaultfs.html#Import_Modeshttps://experienceleague.adobe.com/docs/expe

Explanation
Sling Content Distribution is a feature that allows synchronizing user data across publish servers in a publish farm. Sling Content Distribution uses agents to distribute content from one instance to another using a publish-publish topology. Sling Content Distribution can be configured to synchronize user data under
/home/users and /home/groups paths, as well as their ACLs. References:
https://experienceleague.adobe.com/docs/experience-manager-65/administering/security/sync.html?lang=enhttps