review

index.bs

@@ -1881,7 +1881,7 @@ To obtain the <dfn export for=node>context origin</dfn> of a [=node=] |node|:
 1. Return |node|'s [=node navigable=]'s [=navigable/top-level traversable=]'s
     [=navigable/active document=]'s [=origin=].
 
-Note: The user agent MAY return the embedded origin to allow separate limits
+Note: The user agent may return the embedded origin to allow separate limits
 for specific use cases.
 
 <h3 id="obtaining-randomized-response">Obtaining a randomized response</h3>

verbose_debugging_reports.md

@@ -39,7 +39,9 @@ The `body` will contain the following fields for all source debugging reports:
   This will be a string if there was one such site, or a list of strings if
   there were multiple.
 * `source_event_id`: The source registration's `source_event_id`.
-* `source_site`: The top-level site, or the embedded site for specific use cases, on which the source registration occurred.
+* `source_site`: The top-level site, or the embedded site for specific use cases
+  (for example, [AMP](https://amp.dev) pages rendered by an AMP cache/viewer provider),
+  on which the source registration occurred.
 
 Additionally:
 
@@ -155,8 +157,9 @@ Additionally:
 * If the trigger was attributed to a source, then the `body` will also contain
   the following fields:
    * `source_event_id`: The source registration's `source_event_id`.
-   * `source_site`: The top-level site, or the embedded site for specific use cases, on which the source registration
-      occurred.
+   * `source_site`: The top-level site, or the embedded site for specific use cases
+      (for example, [AMP](https://amp.dev) pages rendered by an AMP cache/viewer provider),
+      on which the source registration occurred.
    * `source_debug_key`: The source registration's `debug_key`, but omitted if
      the source registration did not contain a valid `debug_key` or
      [cookie-based debugging][] was prohibited.