Is it possible to add several keywords to the same page? Will this penalize my page by Google?

Example:

[![meta-keywords elements with multiple keywords](https://i.stack.imgur.com/yXM0h.png)](https://i.stack.imgur.com/yXM0h.png)

What is the implication in adding many keywords? I am expecting I get traffic from all keywords, if it is 100 or 1000000.

Also I would like to know, `meta`-`name` should be `keyword` or anything I can put there like `<meta name="anything"`?