Update README.md

Minor additions to readme "Features" and "Installation"

Author: DaveHealS

README.md

@@ -19,9 +19,10 @@
 Have you ever wanted to remove duplicated songs from your Spotify library? Now you can find and remove them using Spotify Dedup. Spotify Deduplicator is a simple and effective tool for cleaning up your Spotify library. Just log in and it will traverse your playlists, finding duplicate songs. It uses the [Spotify Web API](https://developer.spotify.com/web-api/) to identify songs that appear multiple times in a given playlist. With the press of a button, you can remove duplicate tracks from your playlists and liked songs. It saves time and effort by avoiding the need to manually check for duplicate entries, which can be especially useful for users with large music libraries. No playlists are re-created, ensuring all metadata like creation dates and followers are preserved.
 
 ## Features
-- **Automatic Duplicate Detection**: Finds duplicate tracks in playlists and liked songs based on ID, title, artist, and duration similarity.
+- **Automatic Duplicate Detection**: Finds duplicate tracks in playlists and liked songs.
+- **Detect all duplicate**: Finds duplicates that Spotify does not detect by comparing ID, title, artist, and duration similarity.
 - **Playlist Integrity**: Removes duplicates without creating new playlists, retaining original creation dates and follower counts.
-- **Fast and Efficient**: Works through large libraries while respecting Spotify's rate limits.
+- **Save Time and Effort**: No more manually searching for duplicates. Spotify Deduplicator scans your entire library efficiently.
 - **Cross-Platform**: Works directly in your browser or can be run locally.
 
 ## Usage
@@ -41,7 +42,9 @@ After deduping
 
 ## Installation
 
-Ensure you have **pnpm** installed. If you don't have it, install it using the following gcommand:
+You will need NPM and therefore Node.js installed for this project. Check the [installation guide](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm) for NPM.
+
+Also, ensure you have **pnpm** installed. If you don't have it, install it using the following gcommand:
 
     npm install -g pnpm