Jquery not defined

Put the following in javascript and am getting Jquery not defined within browser.

Any idea how I can fix?

I used a snippet from one of the forum posts. The comment part was added by me…is that the problem?

/*Below makes Place Description NOT required…still shows, but won’t cause VALIDATION!
Additional CSS also required.
From <https://wpgeodirectory.com/support/search/?bbp_search=geodir_message_error&gt;
*/
jQuery( document ).ready(function() {
jQuery(“#geodir_post_desc_row”).removeClass(“required_field”);
});