Fixed wording

Author: simmayor

1-js/02-first-steps/14-function-basics/article.md

@@ -128,7 +128,7 @@ Variables declared outside of any function, such as the outer `userName` in the
 
 Global variables are visible from any function (unless shadowed by locals).
 
-Usually, a function declares all variables specific to its task. Global variables only store project-level data, so when it's important that these variables are accessible from anywhere. Modern code has few or no globals. Most variables reside in their functions.
+Usually, a function declares all variables specific to its task. Global variables only store project-level data, and it's important that these variables are accessible from anywhere. Modern code has few or no globals. Most variables reside in their functions.
 ```
 
 ## Parameters