Promotion is generally use to invite friends to join a community or to spread a news amsong the friends
Steps
1First you have to open your community
2 Click on left hand option i.e promote
3There are two type of promotion :
(i ) text (ii) image
You has to select one
4 Under the content box just type some attractive lines by which user ready to join your community
Then in last click on on create promotion
