Could Use Improvement

Hi @mystech

May be, you are already using a cache plugin and it already added expire of static resources. in this case, you will not see any difference.

If you want to define custom expire, you can edit htaccess file. here is a plugin to edit htaccess: https://www.ads-software.com/plugins/wp-htaccess-editor/

hope, it clear your questions and you will improve rating.

Thanks