WPeMatico creates regular WordPress posts, so you can share them on your social networks with any plugin that publishes your new posts automatically. WPeMatico doesn’t send them by itself.

All of them have a free version in the WordPress repository.

• Blog2Social: Social Media Auto Post & Scheduler
• NextScripts: Social Networks Auto-Poster

Each one supports different networks and has different limits in its free version, so check which one fits the networks you use. You can also search for auto post or social share in Plugins → Add Plugin to find other options.

A few things to check.

• Automatic publishing: WPeMatico publishes the posts in the background, not from the post editor. Make sure the plugin you choose shares the posts published automatically, not only the ones you publish by hand.
• Post status: the posts are shared when they are published. If your campaign saves them as Draft or Pending, they will be shared when you publish them.
• Volume: a campaign can create many posts at once. Most social networks limit how many posts you can send in a short time, so consider sharing only some categories or using the scheduling options of the plugin.

Note: If you use Jetpack and you don’t want to share the posts created by WPeMatico, see How to disable the sharing feature of WPeMatico with Jetpack?