Should I put my keywords in meta-description tag to boost ranking?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  John McLeod: Hi Guys,
  
  Is this meta description tag only for search engines to show in results and increase CTR or is it also for high rankings if we include our keyword in meta description tag. Not stuffing it with keywords but puting keyword just once where needed.
  
  Does it help in getting rankings or not? because i read an article here which says NO - ;http://moz.com/learn/seo/meta-description
• 
  Heena Shah: Me too Looking forward for answer
• 
  Rahul Chauhan: putting keywords at the start in your meta description helps you in ranking but the contribution is quite little
• 
  Ashish Dhanoliya: When you putting keywords in meta description , it must be a definition of keywords you putting. ;
• 
  Ritu Ahuja: +John McLeod Meta tag and descriptions are very important. They help your post getting impressions and clicks on google and that boost your ranking. You should use best keywords in your meta description. 
• 
  Edwin Jonk: From the expert panel in this weeks SEO Questions hangout on air on 01:31:56 into the YouTube video: https://dumbseoquestions.com/q/should_i_put_my_keywords_in_metadescription_tag_to_boost_ranking +John McLeod
  
  The cuetimes listed on this page are functional while the live broadcast continues and also once Youtube has finished processing the public broadcast. Processing time varies between 6-24 hours. During this period the clip is viewable in full but the cuetimes cannot be relied on.
  
  If our assistance with this issue was useful to you, please consider sharing your success story so that others might benefit.