diff --git a/react/src/components/SlotContainer.tsx b/react/src/components/SlotContainer.tsx
index 87d76b1..3ccb1fa 100644
--- a/react/src/components/SlotContainer.tsx
+++ b/react/src/components/SlotContainer.tsx
@@ -6,6 +6,7 @@ import * as React from 'react';
  * See {@link @theoplayer/web-ui!SlotContainer | SlotContainer in @theoplayer/web-ui}.
  *
  * @group Components
+ * @internal
  */
 export const SlotContainer = createComponent({
     tagName: 'theoplayer-slot-container',
diff --git a/src/components/SlotContainer.ts b/src/components/SlotContainer.ts
index a139673..97acb05 100644
--- a/src/components/SlotContainer.ts
+++ b/src/components/SlotContainer.ts
@@ -3,6 +3,21 @@ import slotContainerCss from './SlotContainer.css';
 
 const template = createTemplate('theoplayer-slot-container', `<style>${slotContainerCss}</style><slot></slot>`);
 
+/**
+ * `<theoplayer-slot-container>` - A container that can be assigned to a slot,
+ * and behaves as if all its children are directly assigned to that slot.
+ *
+ * This behaves approximately like a regular `<div>` with style `display: contents`,
+ * but receives some special treatment from e.g. {@link MenuGroup | `<theoplayer-menu-group>`}
+ * which normally expects its {@link Menu | menu}s to be slotted in as direct children.
+ * Those menus can also be children of a `<theoplayer-slot-container>` instead.
+ *
+ * This is an internal component, used mainly by Open Video UI for React.
+ * You shouldn't need this under normal circumstances.
+ *
+ * @group Components
+ * @internal
+ */
 export class SlotContainer extends HTMLElement {
     constructor() {
         super();