Add description on docs' welcome page

docs/source/index.rst

@@ -1,6 +1,3 @@
-Welcome to Pyrogram
-===================
-
 .. raw:: html
 
     <div align="center">
@@ -11,8 +8,47 @@ Welcome to Pyrogram
 
     <p align="center">
         <b>Telegram MTProto API Client Library for Python</b>
+        <br><br>
+        <a href="compiler/api/source/main_api.tl">
+            <img src="https://www.pyrogram.ml/images/scheme.svg"
+                alt="Scheme Layer 74">
+        </a>
+        <a href="https://core.telegram.org/mtproto">
+            <img src="https://www.pyrogram.ml/images/mtproto.svg"
+                alt="MTProto v2.0">
+        </a>
     </p>
 
+About
+=====
+
+Pyrogram is a fully functional Telegram Client Library written from the ground up in Python.
+It offers **simple** and **complete** access to the Telegram Messenger API and is designed for Python developers
+keen on building custom Telegram applications.
+
+Features
+--------
+
+-   **Easy to setup**: Pyrogram can be easily installed and upgraded using **pip**, requires
+    a minimal set of dependencies (which are also automatically managed) and very few lines
+    of code to get started with.
+
+-   **Easy to use**: Pyrogram provides idiomatic, developer-friendly, clean and readable
+    Python code (either generated or hand-written) making the Telegram API simple to use.
+
+-   **High level**: Pyrogram automatically handles all the low-level details of
+    communication with the Telegram servers by implementing the
+    **MTProto Mobile Protocol v2.0** and the mechanisms needed for establishing
+    a reliable connection.
+
+-   **Updated**: Pyrogram makes use of the latest Telegram API version, currently **Layer 74**.
+
+-   **Documented**: Pyrogram API public methods are documented and resemble the well
+    established Telegram Bot API, thus offering a familiar look to Bot developers.
+
+-   **Full API support**: Beside the simple, bot-like methods offered by the Pyrogram API,
+    the library also provides a complete, low-level access to every single Telegram API method.
+
 Preview
 -------
 
@@ -28,12 +64,6 @@ Preview
 
     client.stop()
 
-About
------
-
-Welcome to the Pyrogram's documentation! Here you can find resources for learning how to use the library.
-Contents are organized by topic and are accessible from the sidebar.
-
 To get started, press Next.
 
 .. toctree::