Contact Form 7 is the most popular contact form plugin for WordPress.
Using the WP Google Analytics Events plugin, we can track form submissions with just a few clicks.
I will assume that you already configured the Google Analytics Identifier and selected Universal tracking if needed.
The Contact Form 7 plugin, tags its form submission buttons with the “wpcf7-submit”. This means that the click element name would be wpcf7-submit and the event type will be set to class.