diff --git a/docs/src/theories.md b/docs/src/theories.md
index 1e32035..72738c8 100644
--- a/docs/src/theories.md
+++ b/docs/src/theories.md
@@ -8,3 +8,6 @@ have.
 Boards are for overall themes and tags are for specification. An example of this
 is "Cars" and "Car Types". A board could be "Cars" and then some tags on a pin
 in that board would be "Mustang", "Sports Car", "Sudan", etc.
+
+You would also like to share pins via "board" (designed only for a single user) 
+instead of "tag" which designed for all users.