diff --git a/index.html b/index.html
index 1c45503..f14748b 100644
--- a/index.html
+++ b/index.html
@@ -41,7 +41,10 @@ <h1 class="text-uppercase h5">About MEgen</h1>
                 <h1 class="text-uppercase h5">What are structured data</h1>
 
                 <p>
-                    Structured data are additional data placed on websites. They are not visible to ordinary internet
+                    <a class="text-white-50"
+                       href="https://developers.google.com/search/docs/guides/intro-structured-data"
+                       target="_blank">Structured data</a> are additional data placed on websites. They are not visible
+                    to ordinary internet
                     users, but can be easily processed by machines. MEgen use <a class="text-white-50"
                                                                                  href="https://bioschemas.org/profiles/MolecularEntity/0.5-RELEASE/"
                                                                                  target="_blank">MolecularEntity