title: What does collation utf8mb4_unicode_ci mean
body: <p>I was working on a project and wanted to implement a posts table similar to the wordpress posts table to store page content.</p>
  
  <p>So I basically copied the wp_posts table which is longtext however I noticed under collation it had utf8mb4_unicode_ci</p>
  
  <p>I'm wondering what this means and what its necessary for?</p>