Update README.md

Author: kyb3r

README.md

@@ -79,10 +79,10 @@ Heroku is a free hosting site that can host many web apps. However, the web apps
 ## Features
 
 ### Snippets
-Snippets are shortcuts for predefined messages that you can send. You can add snippets by adding config variables by prefixing the name of the snippet with `SNIPPET_` and setting the value to what you want the message to be. For example you can make a snippet called `hi` by making a config variabled named `SNIPPET_hi`, you can then use the snippet by typing the command `?hi` in the thread you want to reply to.
+Snippets are shortcuts for predefined messages that you can send. Add and remove snippets with the `snippets` command.
 
 ### Custom Mentions
-If you want the bot to mention a specific role instead of `@here`, you need to set a config variable `MENTION` and set the value to the mention of the role or user you want mentioned. To get the mention of a role or user, type `\@role` in chat and you will see something like `<@&515651147516608512>` use this string as the value for the config variable.
+If you want the bot to mention a specific role instead of `@here`, use the `mention` command.
 
 ### Delete Linked Messages
 Did you accidentally send something you didnt mean to with the `reply` command? Dont fret, if you delete the original message on your side, this bot automatically deletes the corresponding message that was sent to the recipient of the thread! This also works with message edits in reverse.