update readme with Horizon info

Author: kevindees

README.md

@@ -1,6 +1,8 @@
 # Laravel Redis Queue
 
-A little command line tool for clearing Laravel Redis queues. This package is for Laravel 5 and removes all jobs from a queue using the Redis driver. 
+A little command line tool for clearing Laravel Redis queues. This package is for Laravel 5 and removes all jobs from a queue using the Redis driver. Because [Laravel Horizon](https://laravel.com/docs/5.6/horizon) uses Redis for its queues, this tool can be used to clear your Horizon jobs.
+
+*If you are using Horizon, it may be best to have a separate Redis connection for your jobs and another for other parts of your application.*
 
 ## Basic Clear
 
@@ -28,4 +30,4 @@ Outputs,
 
 ```
 Clearing Redis queues:emails
-```
+```