Twitter Cards are social meta tags specific to Twitter. These tags create 'cards' that are shown alongside any Tweets that you're site is included in. If you are at all targeting Twitter or think your content may be shared, you should be adding these tags. Please note: For Twitter to include a 'card' for your site, you must first be approved.
Twitter Title tags are one of the 3 most important tags to use on your site for Twitter social sharing. The title tag is what determines the title for any social posts made for the URL.
The Twitter Description tag is one of the 3 most important tags to use on your site because it's used directly by Twitter for representing your content in their social networks.
Twitter Image tags are one of the 3 most important tags to use on your site because Twitter uses these tags when your content is shared to represent the content of your page.
Twitter Card tags are one of the most important tags to use on your site for Twitter social sharing. The card tag tells twitter what type of card is being defined for your page.
Twitter Site tags indicate the Twitter account for the website or platform for which the content was published. The site tag helps users follow and view the profile for your website.
Twitter Creator tags indicate the Twitter account of the person that created the card content. The site tag helps users follow and view a person's profile.