Provide search engines and crawlers useful rich information about your website by specifying Open Graph tags in your meta tags. The Open Graph protocol has been developed by Facebook and it's used by itself.
The common OG tags are:
<meta property="og:title" content="Blog about software development by Gökhan Orhun." /> <meta property="og:site_name" content="Orhun.nl software development & websites" /> <meta property="og:image" content="https://orhun.nl/img/fb_og_image.png" /> <meta property="og:url" content="https://orhun.nl" /> <meta property="og:description" content="Blog about software development by Gökhan Orhun." />
If you share this website on Facebook or Whatsapp, then you would see this:
Find more OG tags on http://ogp.me/
To debug your website for the Open Graph tags, use the Facebook Debug Tool.(you should probably log in first).
Paste your URL in the field and press "Debug". The first time you debug, the scraper shows the cached data. You should press "Fetch new scrape information". This is also the way to clear the cache of the given URL.