diff --git a/Privacy-settings.md b/Privacy-settings.md
index f8c0e16..e8d9c21 100644
--- a/Privacy-settings.md
+++ b/Privacy-settings.md
@@ -1,7 +1,22 @@
+There are three "types" (keys) of privacy settings, which are separate from each other:
+* Last seen (also affects whether you can see the other person's)
+* Chat invite (whether you can be added to groups)
+* Phone calls (who can call you)
+
+For each of these, you have 3 modes (rules):
+* All telegram users
+* Your contacts only
+* Nobody
+
+To set any of these, you need a key to work on and a list of values, which will be a global rule, such as `InputPrivacyValueAllowAll` and exceptions, such as allowing or disallowing specific users.
+
+### Last seen example
+
+To allow no one except "@best_friend" to see your last seen, you would use this:
+```python
 from telethon import TelegramClient
 from telethon.tl.functions.account import SetPrivacyRequest
-from telethon.tl.types import InputPrivacyKeyStatusTimestamp, InputPrivacyValueAllowUsers,\
-    InputPrivacyValueDisallowAll
+from telethon.tl.types import InputPrivacyKeyStatusTimestamp, InputPrivacyValueAllowUsers, InputPrivacyValueDisallowAll
 
 client = TelegramClient(session, api_id, api_hash).start()
 bff = client.get_input_entity('@best_friend')
@@ -12,4 +27,5 @@ rule = InputPrivacyValueDisallowAll()  # main rule is to disallow everyone
 exceptions = InputPrivacyValueAllowUsers([bff])  # more people can be allowed
 values = [rule, exceptions]
 
-client(SetPrivacyRequest(key, values))
\ No newline at end of file
+client(SetPrivacyRequest(key, values))
+```
\ No newline at end of file