Update fragment's definition in Learn-Queries.md

Changing the wording on the description of fragments to nudge people towards a more clear usage, like what Relay.dev does.

Author: inlineblock

Diff for: src/content/learn/Learn-Queries.md

@@ -110,6 +110,7 @@ That's why GraphQL includes reusable units called _fragments_. Fragments let you
   }
 }
 
+# used by the comparison UI component
 fragment comparisonFields on Character {
   name
   appearsIn
@@ -119,7 +120,7 @@ fragment comparisonFields on Character {
 }
 ```
 
-You can see how the above query would be pretty repetitive if the fields were repeated. The concept of fragments is frequently used to split complicated application data requirements into smaller chunks, especially when you need to combine lots of UI components with different fragments into one initial data fetch.
+You can see how the above query would be pretty repetitive if the fields were repeated. The concept of fragments is frequently used to define data requirements of a UI component or utility, creating smaller composable chunks. This is especially beneficial when you need to combine lots of UI components with different fragments into one initial data fetch.
 
 ### Using variables inside fragments