Google follow some rule to create meta keyword-Meta elements are typically used to specify page description,keywords. Meta description are used 165 chr and keywords are no limit
Bing i am not sure coz bing give us 30 percent traffic so maybe they look for keywords but i think you just focus on google coz it's give us 70 percent traffic.
This is my weblog http://www.awesomestuff4all.blogspot.in i used to getting around 800 pageviews per day, but don't know what happened suddenly my site traffic got down from 800 pageviews to 100 pageviews per day... Can anyone help me, how to get back traffic?
Google no longer takes meta keywords into consideration, I am sure Bing has followed that strategy as well. They do however take the meta description into full consideration.