Uppercase vs. lowercase
Meta Keywords
Most search engines do not notice any difference between lowercase and uppercase type and as a result placing the same keyword in both uppercase and lowercase is a waste of time and more importantly it can be seen as spam
Another point to consider is: when people type in words and phrases into a search engine query, they tend to type words very quickly. The quickest way to type in words is not to use any capitalization.
Most search engines do not notice any difference between lowercase and uppercase type and as a result placing the same keyword in both uppercase and lowercase is a waste of time and more importantly it can be seen as spam
Another point to consider is: when people type in words and phrases into a search engine query, they tend to type words very quickly. The quickest way to type in words is not to use any capitalization.



