How do I invite people?

I know this topic has been “solved” now, I just wanted to encourage you to encourage your friend to join the forum even if you don’t get a badge for inviting them. Also, with regard to the “5 levels” if you click/tap on my profile summary will see that I am a “Regular” which correlates to level 3. Note there is no “level 5” since the levels start at 0.