The most popular site for Twine games would be itch.io ( some examples). Once you're ready to take your game public, then you might want to set it up at a real game site, which will not only allow you to share it online, but it will also make it easier for people to find.

However, if you plan on sharing it with a large number of people, then that may not work, as Google Drive has daily bandwidth restrictions. (That's what I use to share my Twine/SugarCube sample code online.) Then you'll need to connect your Google Drive account to DriveToWeb so that, instead of people merely being able to download the files, they will actually be able to try it out online. That will not only let you back up your files there, but once the files are uploaded and shared (files there are not shared by default) people can download them as well. If you just want some early feedback from a few people, you might consider getting a Google Drive account. Basically, you need to find a place to host the game online.

How to share google drive url