diff --git a/subjects/pick-omit/README.md b/subjects/pick-omit/README.md
index a8ea3308..adb865d4 100644
--- a/subjects/pick-omit/README.md
+++ b/subjects/pick-omit/README.md
@@ -2,11 +2,11 @@
 
 ### Instructions
 
-Create a `pick` function that takes an object and keys.
-This function create a new object that pick only the keys, in the second argument, from the object passed as argument.
+Create a `pick` function that takes an object and an array of strings.
+This function returns a new object that contains only the key/value pairs, whose key matches with a string in the array, from the object passed as an argument.
 
-Create a `omit` function that takes an object and keys.
-This function create a new object that omit only the keys, in the second argument, from the object passed as argument.
+Create a `omit` function that takes an object and an array of strings.
+This function returns a new object that contains only the key/value pairs, whose key doesn't match with a single string in the array, from the object passed as an argument.
 
 > Those functions are pure and must not modify the given object