diff --git a/src/button/Link.module.css b/src/button/Link.module.css
index 710d5a1a..6248bc40 100644
--- a/src/button/Link.module.css
+++ b/src/button/Link.module.css
@@ -6,5 +6,8 @@ Please see LICENSE in the repository root for full details.
 */
 
 .external {
+  /* By default links will be blue/purple (or whatever the user agent does), but
+  in our designs we generally want external links to be the same color as the
+  surrounding text */
   color: inherit;
 }
diff --git a/src/button/Link.tsx b/src/button/Link.tsx
index 4114bd20..68c4dd13 100644
--- a/src/button/Link.tsx
+++ b/src/button/Link.tsx
@@ -48,6 +48,7 @@ type Props = Omit<
 
 /**
  * A version of Compound's link component that integrates with our router setup.
+ * This is only for app-internal links.
  */
 export const Link = forwardRef<HTMLAnchorElement, Props>(function Link(
   { to, state, ...props },
@@ -57,6 +58,10 @@ export const Link = forwardRef<HTMLAnchorElement, Props>(function Link(
   return <CpdLink ref={ref} {...props} href={path} onClick={onClick} />;
 });
 
+/**
+ * A link to an external web page, made to fit into blocks of text more subtly
+ * than the normal Compound link component.
+ */
 export const ExternalLink = forwardRef<
   HTMLAnchorElement,
   ComponentPropsWithoutRef<"a">