How to Add Twitter Cards to WordPress - Qode Interactive
Twitter cards: qué son, cómo conseguirlas y cómo sacar partido para tu negocio digital
2 Ways Add Twitter Cards to WordPress + Best Plugins to Use
Whitelisting /.well-known/ directory in robots.txt caused twitter cards to show up as App cards incorrectly - Cards - Twitter Developers
giovannimu (official) — #StaplerLife on Twitter: "@rustybrick @vanessafox @christian_wilde Indexed & practically seen in normal search results vs not seen. It comes up often with old / removed content, site-moves, robotted URLs,
More stats and analysis of robots.txt files | Google Search Central Blog | Google for Developers
2 Ways Add Twitter Cards to WordPress + Best Plugins to Use