Update introduction-to-smart-contracts.rst

1 files changed, 3 insertions, 1 deletions

diff --git a/docs/introduction-to-smart-contracts.rst b/docs/introduction-to-smart-contracts.rst
index 69887134..d6c30db8 100644
--- a/docs/introduction-to-smart-contracts.rst
+++ b/docs/introduction-to-smart-contracts.rst
@@ -33,7 +33,9 @@ Storage
 The first line simply tells that the source code is written for
 Solidity version 0.4.0 or anything newer that does not break functionality
 (up to, but not including, version 0.5.0). This is to ensure that the
-contract does not suddenly behave differently with a new compiler version. For more information about pragma, see [here](https://en.wikipedia.org/wiki/Directive_(programming)).
+contract does not suddenly behave differently with a new compiler version. The keyword ``pragma`` is called that way because, in general,
+pragmas are instructions for the compiler about how to treat the
+source code (e.g. [pragma once](https://en.wikipedia.org/wiki/Pragma_once)).  .
 
 A contract in the sense of Solidity is a collection of code (its *functions*) and
 data (its *state*) that resides at a specific address on the Ethereum