Finished first pass of supplementary services docs

docs/docs/documentation/supplementary-services/deposit-services.md

@@ -7,4 +7,4 @@ description: Discover everything about the deposit services
 
 The `Deposit Services` are independent third party services responsible to provide a place to store and validate data objects *(in our case [plans](/docs/documentation/application/plans/))*. They are used as a source of trust and provide a unique key / signature *(called **DOIs** or **D**ata **O**bject **I**dentifiers)* for every data entity deposited to them.
 
-This platform is directly integrated with the [Zenodo](https://zenodo.org/) deposit.
+This platform is directly integrated with [Zenodo](https://zenodo.org/).

docs/docs/documentation/supplementary-services/notifications/email.md

@@ -1,5 +1,8 @@
 ---
 sidebar_position: 2
+description: Learn about the email notifications.
 ---
 
-# Email
+# Email
+
+These notifications are received by email, using the mail server configured during the platform installation.

docs/docs/documentation/supplementary-services/notifications/in-app.md

@@ -1,5 +1,10 @@
 ---
 sidebar_position: 1
+description: Learn about the in-app notifications.
 ---
 
-# InApp
+# InApp
+
+These notifications are internal and can be viewed when the user clicks the `notifications` icon, next to the profile picture at the top menu bar.
+
+There are two options. The user can either view the latest unread notifications directly showing in the dropdown that comes up when he clicks the menu bar icon or view all of them in a table view, by clicking the `Αll notifications` button. He can also mark them all as read by clicking the `Read all` option.

docs/src/components/HomepageFeatures/index.tsx

@@ -14,7 +14,7 @@ const FeatureList: FeatureItem[] = [
     Svg: require('@site/static/img/undraw_docusaurus_mountain.svg').default,
     description: (
       <>
-        Close the data management planning lifecycle by publishing your DMPs in a FAIR manner. Assign licenses, PIDs and publish DMPs in a repository of your choice.
+        Close the data management planning lifecycle by publishing your Plans in a FAIR manner. Assign licenses, PIDs and publish Plans in a repository of your choice.
       </>
     ),
   },