What Meta informations should I use?

Question

I see a lot of different point of views on internet concerning meta tags. I've been using them for a while, but I'm now wondering if I've been doing it using the current best practices.

I know that the description is the most important one...

<meta name="description" content="This is not a website" /> 

But what about other meta tag? Should I even use something else than the description tag? For instance, some say that using keyword is bad practice now because some website overused them and it could lead to lead the website in the spam folder of the search engine.

Lastly, what is the best practice when writing a description meta tag ? Using my personal example, right now I have a website referencing various songs. Should I do :

<meta name="description" content="MyWebsite - Here, there are songs" /> 

or more something like this on each different page :

<meta name="description" content="Song Title X, Artist Y" /> 

or :

<meta name="description" content="MyWebsite - Here, there are songs | Song Title X, Artist Y" /> 

or any combination of the previous one... or something else?

Thanks !

Answer 1

Here's a list of metatags supported by Google's crawler:

Meta tags - Webmasters/Site owners Help