This is always a mixed question. Some people believe it doesn't make a different whether you use meta keywords, titles and descriptions and that it does not help you get ranked, help you get indexed, help your website get spydered, etc.
Honestly as a person that has been doing SEO and SEM for over ten years I can tell you -- YES it does matter and YES Google and other search engines do take notice. If you don't trust anyone on here telling you what is right and what is wrong, you could always test it out for yourself. Create two of the same niched sites with the same keywords with the same SEO and SEM tactics. One with Meta and one without. See which one gets indexed quicker and which one get's better results on the SERPs.
CEO of Marketing Company and Author of Internet Marketing eBooks: http://amzn.com/e/B00926S9JM