Once your composition has been created, is time to spread to the world.
The generated image can be consumed directly from markup. Just place the URL as Open Graph, JSON+LD or regular metadata as part of your content.
The interface suggest you the code snippet to use; It should be more than enough.
The first request will generate the image on the fly; the successive requests will consume the image from the cache using Microlink CDN.
Cached requests don't impact your plan quota. See pricing for more information.