What if I duplicate the Meta Keywords tag?

[Della Emery]

What if I duplicate the Meta Keywords tag?

[righteous]

it will show u error in google webmasters

[blessy_smith]

Meta Keywords purpose is to inform which keywords are used in content. Having duplicate keywords in meta tags is not good. Always use the primary keywords in Title tags and secondary keywords should be in meta keywords section.

[robwilley7]

The quick answer is no - words in meta keywords are highly unlikely to have any noticeable effect on performance, negative or otherwise. They are largely ignored by Google. If they contained obscenities or similar then you might have issues but otherwise, I would just omit them as your time is better spent elsewhere.