Alexa Ranking important or not

Yes alexa ranking is important.
Actually alexa helps to guess about a site’s amount of visitor.
Mean alexa indicate a sites traffic rank. It will not help you to
get rank for your keywords on search engine. But google page rank  indicate
your sites keywords ranking position.
So you no need to try improve alexa ranking. Just try to increase
quality backlink. Then automatically you will reach on best and
appropriate position on search engine. And you will receive decent
amount of visitor from search engine. Then your alexa ranking will
improve automatically
If you are planning to sell your website then start improving alexa
rank. Lots of buyers check the alexa rank before buying websites.
There are too many search engines which provide rankings and other
than Search Engines there are various other sources(e.g. Alexa
Ranking by Alexa Inc.,Moz Rank by SEOmoz.com etc.)which provides
rankings of their own.