Not really caching but as far as I remember there are HTML Open Graph tags that Facebook checks for in order to fetch the title&#x2F;description etc.<p>Check N°3 on this link <a href="https:&#x2F;&#x2F;developers.facebook.com&#x2F;docs&#x2F;sharing&#x2F;best-practices" rel="nofollow">https:&#x2F;&#x2F;developers.facebook.com&#x2F;docs&#x2F;sharing&#x2F;best-practices</a>