Hello, @sayed,
Thanks for reaching us,
The gutter width generally refers to the spacing between columns in a grid layout.
The gutter width will apply to the columns in the row/container but not to the main container. You are using Elementor Builder on your site. Now, when editing a post/page with Elementor in the editor there is an option to set the section/container “Full Width/Stretched” You can use this feature to avoid the default gutter width.
Please check this link to understand how to set the “Full Width/Stretched” row/container using Elementor: https://elementor.com/help/section-overview/
Have a nice day.
Best Regards,
PThemes Team.