diff --git a/gms-ui/src/components/TopMenu.vue b/gms-ui/src/components/TopMenu.vue
index b71a95cf269bb8ac72c8ff807a700156331802ad..a5db75c6c0091407f50160ac66378c7e7b73c142 100644
--- a/gms-ui/src/components/TopMenu.vue
+++ b/gms-ui/src/components/TopMenu.vue
@@ -9,6 +9,7 @@
 
       <!-- Right aligned nav items -->
       <b-navbar-nav class="ml-auto">
+        <b-nav-item href="help/index.html" target="blank_" class="mr-4">Help</b-nav-item>
         <b-nav-form>
           <b-form-input size="sm" class="mr-sm-2" placeholder="Search" v-model="input.genericSearch.filter" @keydown.native.enter.prevent="genericSearch"></b-form-input>
           <b-button size="sm" class="my-2 my-sm-0" type="button" v-on:click="genericSearch()">Search</b-button>
diff --git a/gms/src/main/java/it/inaf/ia2/gms/authn/SecurityConfig.java b/gms/src/main/java/it/inaf/ia2/gms/authn/SecurityConfig.java
index 8d47685ebd00d9f2cd97b374b9b95cd535f16abc..aa1dd23e3beed7d5682d5b11b9d07c8317fa6471 100644
--- a/gms/src/main/java/it/inaf/ia2/gms/authn/SecurityConfig.java
+++ b/gms/src/main/java/it/inaf/ia2/gms/authn/SecurityConfig.java
@@ -72,7 +72,7 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
      */
     @Override
     public void configure(WebSecurity web) throws Exception {
-        web.ignoring().antMatchers("/ws/jwt/**", "/error", "/logout", "/invited-registration");
+        web.ignoring().antMatchers("/ws/jwt/**", "/error", "/logout", "/invited-registration", "/help/**");
     }
 
     /**
diff --git a/gms/src/main/resources/static/help/help-admin.html b/gms/src/main/resources/static/help/help-admin.html
new file mode 100644
index 0000000000000000000000000000000000000000..f452453aba0beea927dad9fcbb399d1b4fcc2daf
--- /dev/null
+++ b/gms/src/main/resources/static/help/help-admin.html
@@ -0,0 +1,120 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>GMS - Help Page for Administrators</title>
+        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous" />
+    </head>
+    <body>
+        <div class="container">
+            <h1 class="mt-5 text-center mb-4">GMS - Help Page for Administrators</h1>
+
+            <p>Groups inside the GMS are organized in a tree structure (parent groups contain child groups).
+                You can navigate the structure clicking on the group names.
+                The parent of all groups is called ROOT.</p>
+
+            <p class="text-center">
+                <img src="img/gms-admin-groups.jpg" alt="" class="mb-3" />
+            </p>
+
+            <p>Each group has its own members and permissions.</p>
+
+            <p>GMS supports the following permissions:</p>
+            <ul>
+                <li><code>ADMIN</code>: the user can edit the group, create/delete subgroups, add/remove members, add/remove permissions.</li>
+                <li><code>MANAGE_MEMBERS</code>: the user can add/remove members. The system will automatically assign
+                    a <code>VIEW_MEMBERS</code> permission to those members.</li>
+                <li><code>VIEW_MEMBERS</code>: the user can see the other members.</li>
+            </ul>
+
+            <p>Memberships and permissions are handled separately, for example:</p>
+            <ul>
+                <li>A person can be a member of a group without having any permission on it.
+                    In this case applications using the GMS (like a portal) know that the user
+                    is a member of the group but he/she can't do anything on the GMS.</li>
+                <li>A person can have a permission (for example <code>ADMIN</code>) on a group without being
+                    a member of that group. In this case applications using the GMS don't see
+                    the user as a member of the group but he/she can administrate it on the GMS interface.</li>
+                <li>A person can be a member of a group and also have a permission on it (for example <code>MANAGE_MEMBERS</code>).
+                    This is the case of Principal Investigators.</li>
+            </ul>
+
+            <p>Memberships and permissions defined in a parent group are inherited by child groups.</p>
+
+            <h2 class="mt-4 mb-3">Managing groups</h2>
+
+            <p>Go to the "Groups" tab and click on the "Add group" button:</p>
+
+            <p>
+                <img src="img/gms-add-group-btn.jpg" alt="" />
+            </p>
+
+            <p>The following modal dialog is displayed:</p>
+
+            <p>
+                <img src="img/gms-admin-add-group-modal.jpg" alt="" class="mb-3" />
+            </p>
+
+            <p>If you select the "is leaf" checkbox, the group will be a leaf of the tree: this means that
+                it will not be possible to create sub-groups inside it. You can change this setting in any moment
+                clicking on the "Edit group" button (pencil icon <img src="img/pencil-icon.jpg" alt="" />).</p>
+
+            <p>You can delete groups using trash icons (<img src="img/trash-icon.jpg" alt="" />).
+                A dialog will ask for confirming the operation before deleting the group.</p>
+
+            <h2 class="mt-4 mb-3">Managing memberships</h2>
+
+            <p>Go to the "Members" tab and click on the "Add member" button:</p>
+
+            <p>
+                <img src="img/gms-add-member-btn.jpg" alt="" />
+            </p>
+
+            <p>The following modal dialog is displayed:</p>
+
+            <p>
+                <img src="img/gms-admin-add-member-modal.jpg" alt="" class="mb-2 mt-2" />
+            </p>
+
+            <p>Type the name or the email of the user in the search input in order to select the desired user.</p>
+
+            <p>You can delete memberships using the trash icons (<img src="img/trash-icon.jpg" alt="" />).
+                The application will ask you if you want to remove
+                also the associated permission.</p>
+
+            <h2 class="mt-4 mb-3">Managing permissions</h2>
+
+            <p>Go to the "Permissions" tab and click on the "Add permission" button:</p>
+
+            <p>
+                <img src="img/gms-add-permission-btn.jpg" alt="" />
+            </p>
+
+            <p>The following modal dialog is displayed:</p>
+
+            <p>
+                <img src="img/gms-admin-add-permission-modal.jpg" alt="" class="mb-2 mt-2" />
+            </p>
+
+            <p>Type the name or the email of the user in the search input in order to select the desired user.</p>
+
+            <p>You can delete permissions using the trash icons (<img src="img/trash-icon.jpg" alt="" />).
+                Remember that removing permissions doesn't remove memberships.
+                You can also use the edit icon (<img src="img/pencil-icon.jpg" alt="" />)
+                in order to change a permission.</p>
+
+            <h2 class="mt-4">Seeing information about users</h2>
+
+            <p>You can click on the user names in the Members or Permissions tab in order to see a detailed page about a specific user.</p>
+
+            <h2 class="mt-4">Generic search</h2>
+
+            <p>On the top menu bar there is the generic search input. You can use it for searching both users and groups.</p>
+
+            <p>
+                <img src="img/gms-generic-search.jpg" alt="" />
+            </p>
+
+            <p class="text-center mt-5 mb-3"><a href="index.html">Back</a></p>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/gms/src/main/resources/static/help/help-pi.html b/gms/src/main/resources/static/help/help-pi.html
new file mode 100644
index 0000000000000000000000000000000000000000..1cd7633c30103ebaa9457644264723baba275c7a
--- /dev/null
+++ b/gms/src/main/resources/static/help/help-pi.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>GMS - Help Page for Users</title>
+        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous" />
+    </head>
+    <body>
+        <div class="container">
+            <h1 class="mt-5 text-center mb-4">GMS - Help Page for Principal Investigators</h1>
+
+            <p>Groups inside the GMS are organized in a tree structure (parent groups contain child groups).
+                You can navigate the structure clicking on the group names.
+                The parent of all groups is called ROOT.</p>
+
+            <p class="text-center">
+                <img src="img/gms-pi-groups.jpg" alt="" class="mb-3" />
+            </p>
+
+            <h2>Managing memberships</h2>
+
+            <p>Click on the "Add collaborator" button:</p>
+
+            <p>
+                <img src="img/gms-add-collaborator-btn.jpg" alt="" class="mb-3" />
+            </p>
+
+            <p>The following modal dialog is displayed:</p>
+
+            <p>
+                <img src="img/gms-add-collaborator-modal.jpg" alt="" class="mb-2 mt-2" />
+            </p>
+
+            <p>
+                Type the name or the email of the user in the search input in order to select the desired user.
+                The user will be able to see the memberships but he/she will not be able to add other collaborators.
+                If multiple users need to manage memberships of the same group you can ask administrators to enable them.
+            </p>
+
+            <p>You can delete memberships using the trash icons (<img src="img/trash-icon.jpg" alt="" />).
+
+            <h2 class="mt-4">Seeing information about users</h2>
+
+            <p>You can click on the user names in order to see a detailed page about a specific user.</p>
+
+            <h2 class="mt-4">Generic search</h2>
+
+            <p>On the top menu bar there is the generic search input. You can use it for searching both users and groups.</p>
+
+            <p>
+                <img src="img/gms-generic-search.jpg" alt="" />
+            </p>
+
+            <p class="text-center mt-5 mb-3"><a href="index.html">Back</a></p>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/gms/src/main/resources/static/help/img/gms-add-collaborator-btn.jpg b/gms/src/main/resources/static/help/img/gms-add-collaborator-btn.jpg
new file mode 100644
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diff --git a/gms/src/main/resources/static/help/img/gms-add-group-btn.jpg b/gms/src/main/resources/static/help/img/gms-add-group-btn.jpg
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diff --git a/gms/src/main/resources/static/help/img/gms-add-member-btn.jpg b/gms/src/main/resources/static/help/img/gms-add-member-btn.jpg
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diff --git a/gms/src/main/resources/static/help/img/gms-add-permission-btn.jpg b/gms/src/main/resources/static/help/img/gms-add-permission-btn.jpg
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diff --git a/gms/src/main/resources/static/help/img/gms-admin-add-group-modal.jpg b/gms/src/main/resources/static/help/img/gms-admin-add-group-modal.jpg
new file mode 100644
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diff --git a/gms/src/main/resources/static/help/img/gms-admin-add-member-modal.jpg b/gms/src/main/resources/static/help/img/gms-admin-add-member-modal.jpg
new file mode 100644
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diff --git a/gms/src/main/resources/static/help/img/gms-admin-add-permission-modal.jpg b/gms/src/main/resources/static/help/img/gms-admin-add-permission-modal.jpg
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diff --git a/gms/src/main/resources/static/help/img/gms-admin-groups.jpg b/gms/src/main/resources/static/help/img/gms-admin-groups.jpg
new file mode 100644
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diff --git a/gms/src/main/resources/static/help/img/gms-generic-search.jpg b/gms/src/main/resources/static/help/img/gms-generic-search.jpg
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diff --git a/gms/src/main/resources/static/help/img/gms-pi-groups.jpg b/gms/src/main/resources/static/help/img/gms-pi-groups.jpg
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diff --git a/gms/src/main/resources/static/help/img/pencil-icon.jpg b/gms/src/main/resources/static/help/img/pencil-icon.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..0de4d87d8aa9f7364c65bbba26f7ae156ff8da7c
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diff --git a/gms/src/main/resources/static/help/img/trash-icon.jpg b/gms/src/main/resources/static/help/img/trash-icon.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..1cb7d80b7a1b7bc28474ae5f7859bd4a660764be
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diff --git a/gms/src/main/resources/static/help/index.html b/gms/src/main/resources/static/help/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..2a1935af2587edc319429cf158e4ca719986e3b9
--- /dev/null
+++ b/gms/src/main/resources/static/help/index.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>GMS - Help Pages</title>
+        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous" />
+    </head>
+    <body>
+        <div class="container">
+            <h1 class="mt-5 text-center mb-5">GMS - Help Pages</h1>
+            
+            <p class="text-center lead"><strong><a href="help-pi.html">Help page for Principal Investigators</a></strong></p>
+            <p class="text-center lead mb-5"><strong><a href="help-admin.html">Help page for Administrators</a></strong></p>
+            
+            <p class="text-center">For any issue send an email to <a href="mailto:ia2@inaf.it">ia2@inaf.it</a></p>
+        </div>
+    </body>
+</html>
\ No newline at end of file