diff --git a/README.md b/README.md
index e81a678..5dedaef 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# potomark is a simple bookmarking discord bot.
+# potomark is a simple bookmarking and pinning discord bot.
 there's no configuration besides a `.env` file with two keys:
 
 - the bot's token `DISCORD_TOKEN`,
@@ -8,7 +8,9 @@ there's no configuration besides a `.env` file with two keys:
 because we needed a tiny, self hostable bot to remember things of importance for our equally tiny discord server.
 
 ## what it do?
-DMs a user a link to any message they reacte with 🔖 to (tip: you can change the `EMOJI` constant in `bot.rb` to any built-in emoji). also sends part of the message for quick access. that's it.
+- DMs a user a link to any message they react with 🔖 to (tip: you can change the `BOOKMARK_EMOJI` constant in `bot.rb` to any built-in emoji). this also sends part of the message for quick access,
+- lets users pin messages to the channel by reacting with 📌 on that message (change `PIN_EMOJI` to change the emoji). if there are no more of that emoji reactions on the message, it gets unpinned.
+- lets users make sentences one word (or more) at a time in `SENTENCE_CHANNEL`. to finish a sentence, send either of these as a message: `?`, `!`, `.`, `...`, `?!`
 
 ## how?
 requires [ruby](https://www.ruby-lang.org/) >= 3.0 and [bundler](https://bundler.io) >= 2.3.19. the only two dependencies are `dotenv` and `discordrb`, as specified in the `Gemfile`.