To vote, has the form of metadata, singer name, album, song name, the order of songs (tracks), the type of songs, etc.. This metadata can we see one of them through File Explorer, by right-clicking the file and choose Properties (select Summary> Advanced). Likewise, the Meta Keyword and Meta Description, it also forms a second meta application / visualization of metadata.
As the name implies, Meta Keywords are keywords that represent content / content of the website / blog, so Meta Keyword itself contains words or phrases, for example on a web / blog which contains about SEO, Forex, then the keywords that can be represented is : Forex, dollar, Adsense, Online Marketing, Trading etc.
In one form,
meta
elements can specify HTTP headers which should be sent before the actual content when the HTML page is served from Web server to client. For example:<meta http-equiv="Content-Type" content="text/html" >
This specifies that the page should be served with an HTTP header called 'Content-Type' that has a value 'text/html'. This In the general form, a
meta
element specifies name
and associated content
attributes describing aspects of the HTML page. For example:<meta name="keywords" content="wikipedia,encyclopedia" >