Don't use How it works? but How does it work?

index.html

@@ -177,7 +177,7 @@
                     <p class="lead">
                         <a href="https://blog.lesspass.com/lesspass-how-it-works-dde742dd18a4#.vbgschksh"
                            class="btn btn-secondary">
-                            How it works ?
+                            How does it work?
                         </a>
                     </p>
                 </div>