You can edit your site at any time, even after you have published it! This allows you to make changes to your site any time you want and then publish the new changes. To re-publish your site, simply make the changes and click Publish again on the top bar. You will see your changes instantly on your live site.
For More Information Please Refer: https://support.wix.com/en/article/adi-editing-your-site-after-publishing