Am I right?


#1

Twitter Summary Cards source is written in HTML5.
Am I right?

<meta property="fb:app_id" content="AAAAAAAAAAAA">
<meta name="twitter:card" content="summary">
<meta name="twitter:site" content="AAAAAAAAAAAA">
<meta name="twitter:title" content="AAAAAAAAAAAA">
<meta name="twitter:description" content="AAAAAAAAAAAA">
<meta name="twitter:image" content="AAAAAAAAAAAA">
<meta name="twitter:url" content="AAAAAAAAAAAA">

#3

It’s just a set of meta tags you can insert into an HTML page, correct.