diff --git a/redbot/cogs/downloader/downloader.py b/redbot/cogs/downloader/downloader.py
index 9c5ae61c0..df8603d71 100644
--- a/redbot/cogs/downloader/downloader.py
+++ b/redbot/cogs/downloader/downloader.py
@@ -36,6 +36,17 @@ DEPRECATION_NOTICE = _(
 
 @cog_i18n(_)
 class Downloader(commands.Cog):
+    """Install community cogs made by Cog Creators.
+
+    Community cogs, also called third party cogs, are not included
+    in the default Red install.
+    
+    Community cogs come in repositories. Repos are a group of cogs
+    you can install. You always need to add the creator's repository
+    using the `[p]repo` command before you can install one or more
+    cogs from the creator.
+    """
+
     def __init__(self, bot: Red):
         super().__init__()
         self.bot = bot
diff --git a/redbot/cogs/reports/reports.py b/redbot/cogs/reports/reports.py
index ea010b04a..8ced825f1 100644
--- a/redbot/cogs/reports/reports.py
+++ b/redbot/cogs/reports/reports.py
@@ -23,6 +23,12 @@ log = logging.getLogger("red.reports")
 
 @cog_i18n(_)
 class Reports(commands.Cog):
+    """Create user reports that server staff can respond to.
+
+    Users can open reports using `[p]report`. These are then sent
+    to a channel in the server for staff, and the report creator
+    gets a DM. Both can be used to communicate. 
+    """
 
     default_guild_settings = {"output_channel": None, "active": False, "next_ticket": 1}
 
diff --git a/redbot/cogs/streams/streams.py b/redbot/cogs/streams/streams.py
index 4029dc4b2..55840ed50 100644
--- a/redbot/cogs/streams/streams.py
+++ b/redbot/cogs/streams/streams.py
@@ -38,6 +38,11 @@ log = logging.getLogger("red.core.cogs.Streams")
 
 @cog_i18n(_)
 class Streams(commands.Cog):
+    """Various commands relating to streaming platforms.
+
+    You can check if a Twitch, YouTube, Picarto or Mixer stream is
+    currently live.
+    """
 
     global_defaults = {"refresh_timer": 300, "tokens": {}, "streams": []}