The macOS Ventura 13.5 update can be downloaded for free on all eligible Macs using the Software Update section of System Settings.
According to Apple's release notes, macOS Ventura 13.5 introduces important bug fixes and security updates. Apple recommends that all users install the software.
There are no notable feature changes or standout bug fixes in macOS Ventura 13.5, and work on the operating system is wrapping up. Apple is shifting its focus to macOS Sonoma, the next-generation version of macOS that's coming this fall.