Once you've exported your page, site or slideshow you can share it with others by putting it online.
You can do this a few different ways.
Host it yourself or have someone else host it.
Dreamhost - A hosting company that provides domain names and hosting
The following websites provides some basic functionality to view your online pages.
Github - A version control company. They have a free plan that has support running basic HTML web pages called Github Pages. The pages are located on a sub-domain of github.com.
Please read the following guide from MDN on publishing your website.