Long tail keywords or short keyword? and why? For beginners

I wouldn't say that Google prefers something explicitly when it comes to keywords and their length, but it's true that long-tail keywords are easier for ranking as they are more specific and there usually aren't too many competitors for those keywords. The best case is to combine both short and long-tail keywords and implement them both in the site's content and meta-tags, as that way you'll be able to target a wider audience with different interests and various search queries.

 

You always have to work on short and long tail keywords. All keywords are important.