This group should help you understand how to invite all (or some) of your friends into your (or a) group!

No worries it's really easy! There are only three steps for this!

Step One:
Go to your steam group, for this guide I'll be using VanguardRaffles.

Step Two:
If you'll scroll up and look right you should see Invite Friends, click on that.

Step Three:
If you want to invite ALL of your friends click on All as previewed in the image below, if you want to invite a few friends then just mark them by clicking on the fill-box near there names.
After that just click Invite To Group and the invitations will be sent!

I am able to make more guides like this if you enjoyed this one and found it helpful. Giving this guide a good rating will tell me you want more.
Feel free to ask me questions in the comment section!

Don't forget to join VanguardRaffles.
If you wish to donate, not that I expect anyone to, here is my trade link. https://steamcommunity.com/tradeoffer/new/?partner=31914940&token=4fDlrfJO