diff --git a/readme.mdown b/readme.mdown
index a5cbe35..ab139da 100644
--- a/readme.mdown
+++ b/readme.mdown
@@ -1,7 +1,8 @@
 # federation
 
-A big problem is a lack of clarity on what instances are blocked and why by various instances.
-This is a documentation and accessibility issue as I doubt most instances make either.
+In regards to [ActivityPub](https://www.w3.org/TR/activitypub/),
+a big problem is a lack of clarity on what instances are blocked and why by various instances.
+This is a documentation and accessibility issue as I doubt most instances create or publish either.
 Much like users picking an instance to join because of a theme or the moderation policies, instances could join a federation because of a grand moderation policy.
 
 # decentralized authority