As a donator you can use
Console commands: sm_settag "Tag Name" - sm_tags (To Change Tag Color) - also to connect when the server is full [connect IP]
in chat commands: !settag "Tag Name" - !tags (To change tag color) - /settag [Tag Name] - /tags
brackets are not needed
/ = to hide the command in chat
! = to show the command in chat
sm = source mod and is for console commands
IP = server IP of the server you wish to connect to.
Do not put brackets for connecting to the server so console command should = connect IP
How reserved slots work
You type connect 22.214.171.124:27015 in console and it will kick a non vip/supporter for a reserved slot which would be the vip/supporter.
Credit gos to DanRappold