I've setup my site to show previews on Facebook, Twitter Cards and other services using OpenGraph, but I'm wondering what is necessary to make my articles show a "Go to action" on Inbox when they're shared?
You'll need to add the Gmail > Markup > View Action markup to your content.
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "EmailMessage",
"potentialAction": {
"@type": "ViewAction",
"target": "https://watch-movies.com/watch?movieId=abc123",
"name": "Watch movie"
},
"description": "Watch the 'Avengers' movie online"
}
</script>