Update main-concepts.mdx (#568)

* Update main-concepts.mdx

* Update website/docs/main-concepts.mdx

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Co-authored-by: adams85 <31276480+adams85@users.noreply.github.com>

Author: aisz0811

website/docs/main-concepts.mdx

@@ -6,7 +6,7 @@ description: This page explains the basics of feature flags and how to use them.
 
 ## Feature Flag or Setting
 
-A _Setting_ is an essential bit of _ConfigCat_. It can be of multiple types like on/off switch (bool), number (int, double) or any text (string) your application requires to be modified without the need of a new deployment.
+A _Setting_ is an essential bit of _ConfigCat_. It can be of multiple types, such as an on/off switch (bool), number (int, double) or any text (string). You can use it to change your application's behavior remotely, without a new deployment.
 
 A _Feature Flag_ is a _Setting_ of type Bool.