Get Rich Snippets on Google’s SERP with Schema.org
A selection Google's rich snippets and SERP features and how you can acquire these snippets to feature your own website using schema markup.
Knowledge Card
Knowledge cards are rich snippet panels that depict a chart that came into being as the result of data agreement or human-edited data. As such, appearing in a search engine card is out of reach for most companies. However, it might still be useful to know which keywords affect these cards as it can tell you which keywords to search for.
Structured Data and the Knowledge Card
Structured data relevance for the Knowledge Card has not being documented by Google or suggested by anyone else for the moment being. Still, structured data may help Google better understand and classify your content in order to include it.