Steam Automatic Group Invite
This script do it easy for you, when you like to invite some people to your Steam group.
You only need to set the steam_group_custom_url variable to your Steam group custom URL and then when you visit a Steam profile, the script will automatic invite the user to your Steam group.
NOTE: I don't take responsibility whatsoever for any breach of the Steam Community rules. If the script break any rules.
All credits goes to the creator Micheal. https://www.95m.dk/ - I only updated the script so it works..