WordPress 7.0 contains a number of new features and additions including a new admin theme, AI integration, slick transition changes in the admin, new blocks, and many other features to make creating content easier than ever.

You can read more by looking at the release notes: https://wordpress.org/documentation/wordpress-version/version-7.0/

You can also see a complete list of changes: https://core.trac.wordpress.org/query?status=closed&milestone=7.0&col=id&col=summary&col=owner&col=type&col=priority&col=milestone&col=component&order=priority

If you have not done so already – download the update or simply use your existing installation of WordPress to update your site. Either way – this is an excellent time to make a backup copy of your site(s) before upgrading.