An iframe can be used to embed your MapShare session into any web page of your choosing. This will allow all viewers of your page to see the progress of your trip.
If you chose to make your MapShare session public, be sure to disable the message and locate options for your MapShare session. This will prevent unwanted usage charges to your account. For information on how to enable MapShare please read this article first: http://support.inreachcanada.com/kb/articles/47-enabling-mapshare-in-the-explore-portal
Use the code snippet below to insert the MapShare into your website.
<iframe src="https://share.garmin.com/ShareName" frameborder="0" marginwidth="0" marginheight="0" width="810" height="760"></iframe>