You can follow some of the easy steps from below to know more about how can you post in multiple Facebook groups in one click without any trouble.
At First, Sign up in Auto Poster from here – Auto Poster
After Create your Account, Login With your Account.
Now click on Settings from Top Bar, Then click on Facebook Accounts Tab.
Then click Add/Update Facebook Account option. Make sure you are already logged in with your Facebook Account in browser.
Now Select the option of Authenticate this app. Allow Permissions to our app.
Make Sure to Set Post Visibility option as Public While allow permissions to this app. Else this site won’t work for autopost.
After Allow all the permissions, simply close the tab and click on Get app access token.
Here you will see your Access token, Simply copy it.
Note – Sometimes it shows blank access token. If it happens, close the tab and click on Get app access token option again, it will work.
Paste your Access token in below text field and click Add Facebook Account. Then click Close button.
Now Goto Homepage and you can see all of your Groups, Pages in list. You can Select group post one by one or tick all at once by clicking Node Name.
Now Enter your Message which you want to post in all Facebook groups at once. You can add any image Videos also with your Post.
You can click Send Now button for Send all Messages at same time. or you can also Save for Use it later, Schedule post for send all messages at certain time too 🙂 .
Remember Keep opened the tab for post in all groups. If you close the tab, it will stop posting in groups.
If you have any more questions, then feel free to message us at Facebook. I will try my best to help you out.