With Oculus Quest it became much easier to distribute and publish your newest creation.
Distribute .apk
Of course, the simplest way is to share your app is by sharing the .apk file. However, the receiver is required to put their device in developer mode.
Publish to AppLab
Recently, Oculus opened the AppLab. Once your app is accepted for publishing, the content can be downloaded on any Quest without developer mode. Also, new versions can be easily deployed to your audience. However, numerous publishing materials such as screenshots, logos, and trailers are required. The review process also requires a few weeks to complete. Here a video tutorial.
Publish to Oculus Store
The prime venue for Quest apps is the official Oculus store. The process is similar to AppLab, however much more involved, here for more information.