Merge pull request #12509 from RobertLaurella/patch-1

Update index.rst

Author: RobertLaurella

docs/source/index.rst

@@ -77,32 +77,32 @@ Or read the `advanced install guide <starter/installation.html>`_
 .. Add callout items below this line
 
 .. customcalloutitem::
-   :description: Use this 2-step guide to learn the key concepts.
+   :description: Use this 2-step guide to learn key concepts.
    :header: New to Lightning?
    :button_link:  starter/introduction.html
 
 
 .. customcalloutitem::
-   :description: Easily organize your existing PyTorch code as PyTorch Lightning in a few hours.
+   :description: Easily organize your existing PyTorch code into PyTorch Lightning.
    :header: PyTorch to PyTorch Lightning
    :button_link: starter/converting.html
 
 
 .. customcalloutitem::
-   :description: From NLP, Computer vision to RL and meta learning - see how to use Lightning in ALL research areas.
+   :description: See how Lightning in used in research areas like NLP, Computer Vision, RL and meta learning.
    :header: Examples
    :button_link: tutorials.html
 
 
 .. customcalloutitem::
-   :description: Detailed description of API each package. Assumes you already have basic Lightning knowledge.
+   :description: Detailed descriptions of each API package.
    :header: API Reference
    :button_link: api_references.html
 
 
 .. customcalloutitem::
-   :description: From hyperparameters sweeps to cloud training to Pruning and Quantization - Lightning covers the key use-cases.
-   :header: Common Usecases
+   :description: Key Lightning use cases, including hyperparameter sweeps, cloud training, Pruning and Quantization.
+   :header: Common Use Cases
    :button_link: common_usecases.html