WordPress 6.4 is the latest major release in 2023 and contains a number of changes and enhancements make WordPress more efficient as well as addresses over 100 bug fixes.
A few of the highlights:
- New Twenty Twenty-Four theme
- Performance improvements to object caching
- Image loading optimizations
- Block editor improvements
- Option to disable attachment pages
You can read more by looking at the release notes: https://wordpress.org/news/2023/11/shirley/
You can also see a complete list of changes: https://core.trac.wordpress.org/query?status=closed&resolution=fixed&milestone=6.4&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.