You need to have accounts with Facebook, Google+ and Twitter.

See more detailed installation instructions with screenshots here: http://www.nextscripts.com/installation-of-social-networks-auto-poster-for-wordpress

Social Networks Auto Poster (SNAP).

1. Upload plugin folder to the /wp-content/plugins/.
2. Login to your WordPress Admin Panel, Go to the Plugins->Installed Plugins, Find “Next Scripts Google+ AutoPoster” in your list, click “Activate”

Facebook.

1. Create an app and community page for your website.
   1. Login to your Facebook account.
   2. Go to the Facebook Developers page: https://developers.facebook.com/apps
   3. Click “+ Create New App” button. Fill “App Name”, “App Namespace”, agree to policies and click “Continue”, fill captcha, click “Continue”. ***Notice App ID and App Secret on this page.
   4. Click “Website”, enter your website URL
   5. Enter your domain to the App Domain. Domain should be the same domain from URL that you have entered to the “Website” during the step 4.
   6. [Optional - you can skip this step and use existing page] Click “Advanced” from the left side menu “Settings.”. Scroll all the way down and click “Create Facebook Page” button. Facebook will create Community page for your App. Click on it and see the URL. It will be something like http://www.facebook.com/pages/Your-Site-Community/304945439569358
2. Connect Facebook to your WordPress.
   1. Login to your WordPress Admin Panel, Go to the Settings->Social Networks AutoPoster Options.
   2. Check “Auto-publish your Posts to your Facebook Page or Profile” checkbox.
   3. Fill URL of your Community page from step 6 above.
   4. Fill “App ID” and “App Secret” from step 3 above.
3. Authorize Facebook for your WordPress.
   1. Click “Update Settings”. Notice new link “Authorize Your FaceBook Account”.
   2. Click “Authorize Your FaceBook Account” and follow the Facebook authorization wizard. If you get any errors at this step, please make sure that domain for your WordPress site is entered to your App as “App Domain”.
4. Your facebook is ready to use.

Twitter.

1. Create a Twitter App for your website.
   1. Login to your Twitter account.
   2. Go to the Twitter Developers website: https://dev.twitter.com/ Sign in again if asked.
   3. Click “Create an app” link from the right panel. Fill details, click “Create your Twitter application”. ***Notice Consumer key and Consumer secret on this page.
   4. Click “Settings” tab. Scroll to the “Application type”, change Access level from “Read Only” to “Read and Write”. Click “Update this Twitter application settings”.
   5. Come back to “Details” tab. Scroll to the “Your access token” and click “Create my access token” button. Refresh page and notice “Access token” and “Access token secret”. Make sure you have “Read and Write” access level.
2. Connect Twitter to your WordPress.
   1. Login to your WordPress Admin Panel, Go to the Settings->Social Networks AutoPoster Options.
   2. Check “Auto-publish your Posts to your Twitter Page or Profile” checkbox.
   3. Fill your Twitter URL.
   4. Fill “Consumer key” and “Consumer secret” from step 3 above.
   5. Fill “Access token” and “Access token secret” from step 5 above.
3. Your Twitter is ready to use.

Google+.

Google+ don’t yet have API for automated posts. You need to get special library module to be able to publish Google+ posts.

1. Create Google+ page for your website.
   1. Login to your Google+ account.
   2. Click “Create a Google+ page” link from the right panel. Choose category, fill details, click “Create”. ***Notice the URL of your page.
2. Connect Google+ to your WordPress.
   1. Login to your WordPress Admin Panel, Go to the Settings->Social Networks AutoPoster Options.
   2. Check “Auto-publish your Posts to your Google+ Page or Profile” checkbox.
   3. Fill Google+ Login and Password. Please note that WordPress is not storing your Google+ password in very secure manner, so you better create a separate G+ account for your website.
   4. Fill the ID of your page. You can get this ID from your URL (Step 2 above). If your URL is https://plus.google.com/u/0/b/117008619877691455570/ – your ID is 117008619877691455570
3. Your Twitter is ready to use.

Other/Copyrights

Plugin Name: Next Scripts Social Networks Auto-Poster

Plugin URI: http://www.nextscripts.com/social-networks-auto-poster-for-wordpress

Description: This plugin automatically publishes posts from your blog to your Facebook, Twitter, and Google+ profiles and/or pages.

Author: Next Scripts

Author URL: http://www.nextscripts.com

Copyright 2012 Next Scripts, Inc

PHP Twitter API: Copyright 2012 – themattharris – tmhOAuth

PHP Facebook API: Copyright 2011 Facebook, Inc.

NextScripts, Inc