Other humans can already understand your profile information and the things you post on your site. By adding a few simple class names to your HTML, other people’s software can understand it and use it for things like reply contexts, cross-site comments, event RSVPs, and more.
No h-cards were found on your site! Adding one can be as simple as this:
<a href="https://robertvanbregt.nl/" class="h-card" rel="me">Your Name</a>
You can also add other properties for a more detailed profile — see h-card on the microformats wiki for a full list.