Sure, duplicate meta descriptions can be a problem. But duplicate content can be an even bigger problem and is a massive issue for a lot of websites. Research indicates that more than half of the sites online today are dealing with duplicate content issues.
If you want to ensure that your website doesn’t get penalized for this, it’s a good idea to use a tool that will alert you to this type of content. The most popular tool for checking for duplicate content is Copyscape.
You may also consider using SEMrush or Screaming Frog. Once you’ve discovered the offending pages, you can then make changes to content so that you can avoid any problems. You may also consider getting rid of this content altogether.