Where do I place the CSS to Not display the Company Logo as Featured Image?

Hi Adam,
As I have read the posts regarding the company logo being displayed as the featured image, and saw you that you said to add the CSS body.single-job_listing article .et_post_meta_wrapper img { display: none; }

I have tried with Simple CSS as you have suggested, cleared all the cache, and changed the browser. Could you please help with showing exactly where to put the body.single-job_listing article .et_post_meta_wrapper img { display: none; }

Would very much appreciate it if you could show step-by-step as I am quite new to CSS ?? Thank you so much.

https://www.ads-software.com/plugins/wp-job-manager/