diff --git a/platform/formats/po.mdx b/platform/formats/po.mdx
index 5887660b5..5881bc812 100644
--- a/platform/formats/po.mdx
+++ b/platform/formats/po.mdx
@@ -49,8 +49,9 @@ Tolgee converts the placeholders to the [Tolgee Universal ICU placeholders](/pla
 when enabled.
 
 ## Feature support
-Tolgee supports importing of basic `msgid` and `msgstr` fields, the plural `msgid_plural` and `msgstr[..]` arrays and it
-imports the `extracted comments` (`#.`) as the key descriptions. No other fields are supported.
+Tolgee supports importing of basic `msgid` and `msgstr` fields, the plural `msgid_plural` and `msgstr[..]` arrays,
+the optional `msgctxt` (see [msgctxt and key names](#msgctxt-and-key-names) below), and it imports the
+`extracted comments` (`#.`) as the key descriptions. No other fields are supported.
 
 ## The message format and placeholder conversion
 import {
@@ -63,10 +64,39 @@ import {
 ## Exporting
 When exporting the data back to the .po file, the placeholders are converted back to the original format.
 
+## Message context (`msgctxt`) and key names {#msgctxt-and-key-names}
+
+In Gettext, the optional `msgctxt` field disambiguates entries that share the same `msgid` but have different meanings
+in different parts of an application. The pair `(msgctxt, msgid)` together identifies a single translatable entry, so
+two entries with the same `msgid` but different `msgctxt` are distinct keys.
+
+```po
+msgctxt "navigation"
+msgid "Open"
+msgstr "Öffnen"
+
+msgctxt "file"
+msgid "Open"
+msgstr "Öffnen"
+```
+
+Tolgee keys are identified by their name, so to keep both entries distinct on import, Tolgee stores the key as
+`"<msgctxt>\u0004<msgid>"` — the same `EOT` separator that the GNU Gettext MO format uses internally. The platform UI
+renders the `msgctxt` portion as a chip in front of the `msgid`, so a key named `"navigation\u0004Open"` is
+shown as:
+
+> `[navigation]` Open
+
+The separator stays part of the stored key name; on export Tolgee splits it back into a real `msgctxt` line. Keys
+imported without a `msgctxt` are stored as plain `msgid` and exported without the field.
+
+For background on the `msgctxt` field itself, see the
+[GNU Gettext documentation on contexts](https://www.gnu.org/software/gettext/manual/html_node/Contexts.html).
+
 ## Plural import and `msgid_plural` field
 When importing the `.po` file, Tolgee always imports the `msgid` as the key. When `msgid_plural` is present, Tolgee
 imports the field as a `_poFileMsgIdPlural` custom value, so it is able to export the plural of the
-the same way it was imported.
+same way it was imported.
 
 import SeeCustom from "./components/_see_custom_values.mdx";