Apple adds in more privacy controls for macOS Mojave, which line up with some of the new iOS 12 options.
You get more control over your data. Apps need your permission before accessing the camera or microphone. They also need to ask for Messages and Mail access.
There is new tracking prevention feature in Safari that will help prevent advertisers from tracking you across multiple websites to target you with specific ads over and over again. It also prevents social media share buttons from tracking you without your permission.
Rounding out this protection, you also get strong passwords automatically created and tracked by Safari, and available on your iPhone and iPad too.