I just discovered a new way to post message in multiple FB groups using my Gmail account. I want to share this idea because I know that you are tired of posting in different groups in Facebook. In order to save time and effort visiting each group and then post a message or an advertisement, follow these steps:
1. Visit a Facebook Group
2. Take a look at the URL
3. Open your Gmail account
4. Click the “Add Contact” icon
5. Copy the group mail address
6. Paste the group address and add @groups.facebook.com
7. Press Enter
8. Repeat steps 1-7 in other groups you want to add as your contact in your Gmail account.
9. Select your recepients
10. Compose your Message.