Clarify targetId and targetType descriptions

(cherry picked from commit 190d614)

Author: saschaszott

statistics-viewevents.md

@@ -9,10 +9,12 @@ To track a page view, make an HTTP POST request to this endpoint.
 The sections below describe the parameters for a page view event. All other information about the interaction can be derived from the request itself.
 
 ### Required Parameters
-- `targetId`: The id of the object the user viewed
-- `targetType`: The type of the object the user viewed
+
+- `targetId`: The UUID of the DSpace object the user viewed
+- `targetType`: The type of the object the user viewed, e.g., `item`, `bitstream`, `collection` etc.
 
 ### Optional Parameters
+
 - `referrer`: The referrer of the object the user viewed. When this value is not present, it will be derived from the request instead. 
 
 ### Status codes: